It’s been almost 10 years since I started Financial Samurai and I’m actually earning a good income stream online now. Financial Samurai has given me a purpose in early retirement. And, I’m having a ton of fun running this site as well! Here’s a real snapshot of a personal finance blogger who makes $150,000+ a year from his site and another $180,000 from various consulting opportunities due to his site.

The introduction of social media has caused a change how viral marketing is used and the speed at which information is spread and users interact.[35] This has prompted many companies to use social media as a way to market themselves and their products, with Elsamari Botha and Mignon Reyneke stating that viral messages are "playing an increasingly important role in influencing and shifting public opinion on corporate reputations, brands, and products as well as political parties and public personalities to name but a few."[35]
Dividend Income: Dividend income is wonderful because it is completely passive and is taxed at only 15% if you are in the 25%, 28%, 33%, and 35% income tax bracket. If you are in the 39.6% income tax bracket you will pay a 20% tax on your dividends. My dividend income portfolio mainly consist of dividend equity and bond ETFs such as DVY, VYM, MUB, TLT, and IEF. Total stock and bond income is a little over $100,000 a year due to a heavy accumulation of stocks and municipal bonds after selling my house.
Personal finance software can go a long way in helping you to take control of your money and meeting your financial goals. It’s important to note, however, that some focus more on budgeting and expense tracking while others prioritize investing portfolios and income taxes. Explore several different programs and read reviews to find the one that’s right for you.
To save time and effort, a person can group two or more of their passive activities into one larger activity, provided they form an "appropriate economic unit." When a taxpayer does this, instead of having to provide material participation in multiple activities, they only have to provide it for the activity as a whole. In addition, if a person includes multiple activities into one group and has to dispose of one of those activities, they’ve only done away with part of a larger activity as opposed to all of a smaller one. 
I like the way you have listed the ways to earn extra income and was quite surprise that you did not make mention of network marketing, which is a way to make extra income without quitting your regular, though most people view mlm as a pyramid scheme but the real pyramid scheme is a regular 9 to 5, because you can only have one president of a company at any given time and network marketing business model to promote product that can be used is really cheap to join and can offer a substantial extra income or what do you think?
I knew I didn't want to work 70 hours a week in finance forever. My body was breaking down, and I was constantly stressed. As a result, I started saving every other paycheck and 100% of my bonus since my first year out of college in 1999. By the time 2012 rolled around, I was earning enough passive income (about $78,000) to negotiate a severance and be free.
Oreo did in fact have 15 person strong social media team standing by to jump on anything that could have happened during the evening but you can still be this viral with a one person team if you can keep on top of current trends in your industry. Learn from this example of great viral marketing and use current events to position your product in the middle of it in a positive light.

A new energy drink company, for example, could create an Internet video featuring a person who consumes the energy drink before performing a seemingly impossible bicycle jump. If the video is made to look real, it may encourage people who see it to share it with others. After the video receives enough views, the company could reveal its true purpose, convincing its viewers to seek out more information about the drink without ever using a traditional advertisement.

Speaking of credit cards, if you don't use them to rack up debt, you can instead use them to generate income streams for you -- via their cash-back or rewards programs. Some cards offer flat-rate cash-back percentages up to about 2%. Others target certain kinds of spending or certain retailers. If you spend a lot at, for example, you can get a card that rewards you with 5% cash back there -- which can really add up. (It's not hard to spend $250 per month at Amazon, which is $3,000 per year -- enough to earn $150 back.)
Gives away valuable products or services. “Free” is the most powerful word in a marketer’s vocabulary. Most viral marketing programs give away valuable products or services to attract attention. Free email services, free information, free “cool” buttons, free software programs that perform powerful functions but not as much as you get in the “pro” version. “Cheap” or “inexpensive” may generate a wave of interest, but “free” will usually do it much faster.
The solution was to create a video entitled “The Princess Machine.” In it, three bored girls build and launch a Rube Goldberg machine designed to do one task but in the most complicated way. It shows engineering skills and GoldieBlox toys, physics and chain reactions. It could be straight out of a Dr. Seuss book. And somehow it entrances the viewer for the full two minutes.

Rental properties are defined as passive income with a couple of exceptions. If you’re a real estate professional, any rental income you’re making counts as active income. If you’re "self-renting," meaning that you own a space and are renting it out to a corporation or partnership where you conduct business, that does not constitute passive income unless that lease had been signed before 1988, in which case you’ve been grandfathered into having that income being defined as passive. According to the IRS, "it does not matter whether or not the use is under a lease, a service contract, or some other arrangement."
All viral marketing examples — deliberate or accidental — have three things in common: the message, the messenger and the environment. Each part must be leveraged to create a successful viral marketing campaign. Viral marketing campaigns may be created by any size of business and can stand alone or be a part of a larger traditional campaign. The campaigns themselves may utilize a number of tools, such as videos, games, images, email and text messaging, free products, appealing to the emotions of users or viewers, raising awareness to a worthy cause, and making such products, ideas or media easy to consume and share. Viral marketing often relies on the help of an influencer, who has a large network of followers.
If you have a blog or some other property that has visitors, you might profit passively via affiliate advertising. For example, imagine that you write a blog about movies. You might review some books about movies, and then link to them on Amazon so you get a cut of the purchase price when anyone buys books through the links. If you blog about hiking, you might promote some hiking gear you recommend on the blog, again generating passive income if anyone buys any of it.
Betterment – Betterment was the first robo-advisor to launch, almost ten years ago. They’ve automated the entire investing process, so all you have to do is watch your portfolio of assets grow (over the long run, of course). They do charge a .25% annual fee of your account total, so if you’ve got $100,000 that’s being managed by Betterment, you’ll pay just over $20 per month.
Instagram, also owned by Facebook, may use similar algorithms to determine the types of trending content appearing in a user’s news feed or Explore tab in the Instagram app. Smaller businesses appear to have a better ability to trend on Instagram using viral content compared to Facebook, although publishers and individuals may begin to take the lead there as well.
Peer-to-peer lending ($1,440 a year): I've lost interest in P2P lending since returns started coming down. You would think that returns would start going up with a rise in interest rates, but I'm not really seeing this yet. Prosper missed its window for an initial public offering in 2015-16, and LendingClub is just chugging along. I hate it when people default on their debt obligations, which is why I haven't invested large sums of money in P2P. That said, I'm still earning a respectable 7% a year in P2P, which is much better than the stock market is doing so far in 2018!

* I use Personal Capital to track all my finances in one place. It’s much easier to use their free software to follow 28 accounts on one platform than to log into various accounts to check my balances. They’ve also got great tools for x-raying your portfolio for excessive fees, recommending a more optimized asset allocation, and planning for retirement with their Retirement Planner.
The list of passive income ideas could go on forever. As you search for the best fit, keep an eye out for ideas that show positive long-term track records. Do other people make money on the idea? Has it come back to bite someone who tried it? Some people ask me about passive income options like drink, vending, or other rental machines in public places. The bottom line? Don’t fall for any passive income ideas that promise a quick return or require huge amounts of money upfront. They will sabotage your other financial goals. Look for ideas that are steady, profitable, and trustworthy. Do your research. And never go into debt!
Remember the HillTop ad that Coca-Cola did? If not, perhaps the lyrics will spark a memory - "I'd Like to Buy the World a Coke."  Is the song stuck in your head?  This jingle had the whole world singing, and if that weren't enough, it was recently revisited on the Mad Man series that had everyone humming it again.  The song spoke of unity and tolerance, and as consumers, we gravitated to it and shared it.
The growth of social networks significantly contributed to the effectiveness of viral marketing.[30] As of 2009, two thirds of the world's Internet population visits a social networking service or blog site at least every week.[31] Facebook alone has over 1 billion active users.[32] In 2009, time spent visiting social media sites began to exceed time spent emailing.[33] A 2010 study found that 52% of people who view news online forward it on through social networks, email, or posts.[34]