Wow! What an awesome list! My favorite is the stock photography because I love photography. I have had some success there, particularly with one photo I make some decent income from. I think the key with stock photography is finding a shot that is high demand. Then, find a new unique way to frame that shot. This is the reason my St. Louis Arch photo is a top 10 on both ShutterStock and iStockPhoto. Thanks for the awesome ideas above!
Investing is arguably the easiest way to make passive income.  The problem is most investments sound good in theory but don’t work out so well in practice.  And if you don’t have much experience or access to capital, let alone the time to work it all out, it can seem more or less impossible.  However, there is one smart way to invest that just might work.  Continue reading >
Ambient Advertising is about placing ads on unusual objects or in unusual places where you wouldn’t usually expect to have an advertisement. Description: Ambient advertising evolved as a concept because it has a lasting impact on the minds of consumers which makes it more effective. Ambient advertising is all about creativity, and how effectively the advertiser is able to communicate the message

Takes advantage of other resources. The most creative viral marketing plans use other resources to get the word out. Affiliate programs, for example, place text or graphic links on other websites. Authors who give away free articles, seek to position their articles on other web pages. A news release can be picked up by hundreds of periodicals and form the basis of articles seen by hundreds of thousands of readers. Now someone else’s newsprint or web page is relaying your marketing message. Someone else’s resources are depleted rather than your own.

Another way to wring income out of stocks, even if they don't pay dividends, is to buy stocks that you expect will appreciate in value over time and then, when you need income, sell some shares. If you have a fat portfolio of such stocks when you retire, you might sell some shares every year to create a cash stream for yourself. Studying and choosing the stocks that will perform very well for you is easier said than done, though, so if you don't have the interest, skills, or time to become your own stock analyst, consider simply investing in a low-fee broad-market index fund or two, such as one based on the S&P 500. Here's how much you might accumulate over several periods if your investments average 8% average annual growth:
​I’ve been into home décor lately and I had to turn to Etsy to find exactly what I wanted. I ended up purchasing digital files of the artwork I wanted printed out! The seller had made a bunch of wall art, digitized, and listed it on Etsy for instant download. There are other popular digital files on Etsy as well such as monthly planners. If you’re into graphic design this could be an amazing passive income idea for you.
I am still working on my passive income, however I like multiple income streams even more. My favorite is capital gains because it is one of the lowest rates. One of the best passive income streams is a pension/Social Security. As I near retirement, I like the concept of it supporting my needs and my 401k supporting my wants. In addition, my brokerage accounts are all at capital gains rates. Don’t misunderstand, I am still working on adding more because I like multiple income streams!
No doubt that harnessing influencers would be a lucrative business for both companies and influencers.[54] The concept of 'influencer' is no longer just an 'expert' but also anyone who delivers and influence on the credibility of a message (e.g. blogger)[49] In 2014, BritMums, network sharing family's daily life, had 6,000 bloggers and 11,300 views per month on average[55][56] and became endorsers for some particular brand such as Coca-Cola, Morrison. Another case, Aimee Song who had over 3.6m followers on the Instagram page and became Laura Mercier's social media influencers, gaining $500,000 monthly.[55]
YouTube brought in nearly $4 billion in estimated ad revenue in 2018. So you can earn a potentially large income by uploading videos to the platform and then watching those ad dollars roll in. You may need or want to upload videos regularly, which isn’t especially passive. But you don’t need to provide a specific product or service directly to customers.
I think the holy grail of financial freedom is having so many passive income. This way you will never worry about your financial needs because everything is taken care of your assets. You will have all the your time in the world and visit all places you dream about. You have your time and money. This is the dream of most people which only few ever achieved.
And while real estate is an excellent option, it does require a significant initial investment, so whether or not this passive income stream is right for you depends on your current financial situation. You might be better off starting with an investment strategy where you can build funds until you have a big enough sum to get involved in real estate.
^ Semenov, Alexander; Alexander Nikolaev; Alexander Veremyev; Vladimir Boginski; Eduardo Pasiliao (2016). Analysis of Viral Advertisement Re-Posting Activity in Social Media. Computational Social Networks. CSoNet 2016. Lecture Notes in Computer Science, Vol 9795. Lecture Notes in Computer Science. 9795. pp. 123–134. doi:10.1007/978-3-319-42345-6_11. ISBN 978-3-319-42344-9.
Another way to generate passive income is to invest and be a silent partner in a business. This is very risky, but with risk comes the potential for high returns. For example, several years ago both Lyft and Uber were looking for private investors to invest in their companies. Today, they are worth billions - but you as an investor would only reap that benefit if they go public via an IPO, or get acquired. So, it's risky.

Good suggestions. I have many of these. One word about the “app” idea. I had a great idea related to personal taxes that I tried to get off the ground with my accountant as a partner. I would say it’s difficult to do this unless you have a coder on your team. Hiring someone is not really viable financially unless the app is simple. When we finally got the quote for a coder to write what we wanted (and after doing lots of mock ups ourselves and getting a demo for investors) the estimate was about 750k just to really get started.

What’s also really important to realize here is that when I took the exam I was teaching people to study for, I didn’t get a perfect score. In fact, I didn’t even get close to a perfect score. I passed. But I also knew a lot about this exam—way more than somebody who was just getting started diving into studying for it. And it was because of that, because I was just a few steps ahead of them, that they trusted me to help them with that information. To support this, I provided a lot of great free value to help them along the way. I engaged in conversations and interacted in comments sections and on forums. Most of all, I just really cared about those people, because I struggled big-time with that exam myself.
Ice Bucket Challenge only asked participants to pour a bucket of ice-cold water and donate. The objective was kept simple and clear, and challengers were not required to put in much effort. It is important for you to keep your message direct and simple as customers don’t have the time and patience to go through a lot of content to grasp the crux of your message.
The CD is one of the most effective ways to create passive wealth over time and has been used by investors for generations. Ask your grandparents; it is highly likely they own CDs (TDs) with their local bank or Credit Union. This is done by creating CD ladders to maximize effectiveness. Most Bank and Credit Union CDs have zero fees attached unless you cash out before maturity.
We have 1 rental at the moment and we are renovating the second one. Last year we generated over $14,000 net passive income (after mortgage payments and taxes) from one apartment, and all I had to do was go in to inspect the property 3 times to make sure the tenants weren’t destroying it! It turned out they kept it in perfect condition and they were lovely people! Call me lucky.
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]