I'm going to add in something that has yet to be said. You CANNOT plan to create a viral piece of content or viral marketing effort. The virality of information and messaging is subject DIRECTLY to the audience and how it sees, understands, shares and promotes this content. The major failing of any and all marketing departments and C-suite executives is that they request a viral video or viral image or viral tweet to help build the brand or promote an event. It. DOESN'T. WORK. YOU. CAN'T. DO. IT. If there were a true formula for creating viral content, it would be worth BILLIONS and only the most successful companies would own the patent on the strategy and methodology. Viral just happens and you thank your stars if it happens for your content or message. Now move along. Real marketing takes hard work and thoughtfulness.

Thanks for the great article…although I have to point out many of the items listed are not passive but active, such as selling bodily fluids, writing blogs or resumes, and collecting bottles and cans. To be truly passive, the income source must require no effort on your part (after initial setup). Real estate, dividends, P2P lending…these are truly passive income sources.
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.
What I did:The first two years of work in NYC was brutal. I told myself there was no way I could work on Wall St for my entire career because I’d probably die from heart failure by age 40. Having an early death in my mind willed me to save 50%+ from the first year onward and devise a CD, real estate, and stock investment distribution system for my savings every year. I thought about starting this site for at least a year before I hired someone from Craigslist to give set me up and push me forward. Hiring someone to get started is totally worth it if you are a master procrastinator. You can now learn how to start your own site with my step-by-step guide to save yourself time and money. 
Viral marketing is often used in conjunction with other methods of marketing, such as in the case of the Blair Witch Project. The viral aspect of the campaign generated buzz about the story long before the release of commercials, trailers, posters, and other forms of traditional marketing. This caused many people to already talk about the movie before it was officially announced to the public.

Word-of-mouth marketing is a key component to the growth of a small business. It's often word-of-mouth marketing that keeps small businesses running in the early days of operation when there is little to no marketing budget. The consumer shares their experience with your products or services, and they share it with their family and friends. It increases your consumer base and increases your sales.
In January 2018, I missed my chance of raising the rent on my new incoming tenants because it didn't come to mind until very late in the interview process. I didn't write about my previous tenant's sudden decision to move out in December 2017 after 1.5 years, because they provided a relatively seamless transition by introducing their longtime friends to replace them. I didn't miss a month of rent and didn't have to do any marketing, so I felt I'd just keep the rent the same.
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The main risk coming from the company is for it to target the wrong influencer or segment. Once the content is online, the sender won't be able to control it anymore.[63] It is therefore vital to aim at a particular segment when releasing the message. This is what happened to the company BlendTech which released videos showing the blender could blend anything, and encouraged users to share videos. This mainly caught the attention of teenage boys who thought it funny to blend and destroy anything they could;[64] even though the videos went viral, they did not target potential buyers of the product. This is considered to be one of the major factors that affects the success of the online promotion. It is critical and inevitable for the organisations to target the right audience. Another risk with internet is that a company's video could end up going viral on the other side of the planet where their products are not even for sale.[65]
4) Treat Passive Income Like A Game. The only real way to begin your multiple passive income journey is when you are making active income. The initial funding has to come from somewhere. Hence, treat passive income as a game that has various levels. If you fail to achieve one level, it’s not the end of the world since you still have active income and can restart. Furthermore, a game is meant to be played with integrity. Using shortcuts (non passive income streams), someone else’s income as a supplement (spouse), or one-offs (capital gains) does not count. The primary purpose of any game is to bring enjoyment to the player and beat the boss.
Humor: Old Spice’s viral video marketing campaign used humor to great effect. They had to. After all, there aren’t many other interesting ways to promote a deodorant / body wash. But they did it with a knowing smirk. The brand didn’t mind poking fun at itself. And it worked. The usage of humor introduced the brand to a younger, Internet-savvy audience.
The first thing that we need to calculate is the number of new customers that each existing customer is able to successfully convert. This turns out to be an extremely important variable, and is known as the Viral Coefficient. The formula to calculate the viral coefficient is pretty simple: multiply the number of invitations by the conversion rate.
Searching for the right reasons to earn little bit of extra income may help you to see your present circumstances in a more effective manner. For example, if you want passive income because your regular income is not sufficient enough to support you, you need to evaluate as to whether you are in right profession or job? If work is not sufficiently paying you according to your skills, you may need to change your job rather than committing yourself to generating passive income. So clearly decide as to why you need passive income and where you will spend it.
Fundrise – With a minimum investment of just $500, investors of all types can make crowd-funded real estate investments through Fundrise. This means you get the benefits of being a landlord without actually having to deal with owning or managing the properties yourself. Even though we own 2 rental properties, we recently began investing in Fundrise ourselves. We love it because there is no “accredited investor” requirement, making it far more accessible for the average person than the other two options below. Follow the link above to learn more, or read our full review here.
Speaking of Mad Men during the third season of Mad Men they worked to create buzz through an application called Mad Men Yourself.  The application as an avatar creator that helped you to create an avatar that made a 60s stylized version of yourself.  The site received over half a million visitors the first week.   After five years you can still use the application, and it's going strong.
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.
Buy vending machines and put them into areas that receive high levels of foot traffic. The investment cost is high, but from then on it is a matter of restocking the machines as needed. If you are able to find success with your first machine, there is nothing stopping you replicating it many times over. This business model is very passive, but the high start up cost and low potential for super profits holds it back in my opinion.
Other stores with associated credit cards include Target, Costco, Gap, Lowe's, TJX, Toys R Us, and Wal-Mart. Many offer 3% to 5% in cash back or discounted prices, and many offer other perks, too, such as free shipping on items purchased at the sponsoring retailer, while others might let you return items without a receipt, or will donate money to charity whenever you use the card. If you travel a lot, you can use travel-related credit cards to rack up lots of points and rewards that can be used instead of cash, keeping more cash in your pocket.
Viral marketing is any marketing technique that induces websites or users to pass on a marketing message to other sites or users, creating a potentially exponential growth in the message's visibility and effect. A popular example of successful viral marketing is Hotmail, a company now owned by Microsoft, that promoted its services and its own advertisers' messages in every user's email notes.
Determine who your target audience is in the earliest stages of your campaign creation. To achieve this, ask questions such as: Who do I want to connect with? What content would they feel passionate about? What are their hopes, dreams, and values? Why would they care about my campaign? What will can I do to make them want to share my content with their social network?

A truly viral product emerged from targeting a truly viral problem in the digital age, known as attention deficit disorder. Allowing people globally to channel their nervousness into an entertaining handheld device has allowed for the viral spread of Fidget Spinners. The products modest beginnings spread virally through school children and later through to adults. We started seeing fidget spinners in social media, memes with fidget spinners, fidget spinners distracting people while crossing the street, and of course, fidget spinners in the impulse purchase section of your local supermarket. This little product achieved a viral marketing status through providing a ‘solution’ to a viral problem and bringing about a world full of fidgetty temptation.