This one may seem simple, but that’s only because it is. If you were to move your savings from a traditional, brick-and-mortar bank with a low-interest rate and into a high-yield savings account online, over time you can make a surprising amount of extra cash. Online banks are FDIC-insured just like the traditional brick-and-mortar institutions, so your money is just as safe.
3. Start as soon as possible. Building a livable passive-income stream takes a tremendously long time, largely because of declining interest rates since the late 1980s. Gone are the days of making a 5%-plus return on a short-term CD or savings account. Today, the best 12-month CD is at 2.5%, and the best money-market rate is about 1.85%, which is not bad, considering such rates were below 0.5% just a couple of years ago. Know that every $100 you save can generate at least $2.5 in passive income.
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.
This “use” can be as simple as wanting to see a hated popstar get his image shredded. It can be finding out how to survive a zombie apocalypse. Besides use, today’s consumers want to feel like they’re part of your product. This can be as simple as rewarding them with your product for an action, or including them vicariously through visual content that incorporate people just like them.
You brought some awesome examples. One of the best ways to get your campaign off the ground is by starting with the ideal audience. I find that I can use data to find my top customers and then make those into ambassadors, nurture those relationships, to create an epic viral campaign. Gilles de Clerck, founder of the Growth Revolution, talks about it here -

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.
Agreed but I might consider a blended portfolio of large and small cap stocks using low cost mutual funds (I found a fidelity large cap fund FUSVX with a net expense of .035% that has also delivered 17%+ YTD gains, some are dividend some are growth stock in the fund) UNLESS you’re close to retirement. This way you get the growth upside on small cap paired with the stablilty of some large cap stocks while maintaining balanced ricks.
One of the simplest ways to enjoy passive income streams is to buy stock in healthy and growing companies that pay dividends. Better still, look for dividends that have been increased regularly at a good clip (many companies often hike their payouts annually) and that have room for further growth, as evidenced by a dividend payout ratio of around 70% or less. The payout ratio is the amount of the annual dividend divided by the trailing 12 months' earnings per share. It reflects the portion of earnings being paid out in dividends. The lower the ratio, the more room for growth. A ratio above 100% means the company is paying out more than it earns, which isn't too sustainable. Here are some examples of stocks you might consider and research further:

The most viral products are those that only work if they are shared. For example, Skype only worked in the early days if you got your friends on to Skype, otherwise you had no way to call them. If you have an application today, think about how you can make it social, where it would work better by sharing data with friends/co-workers. That provides a great incentive for customers to invite their friends/colleagues to use the application.
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.

The term viral strategy was first used in marketing in 1995, in a pre-digital marketing era, by a strategy team at Chiat/Day advertising in LA (now TBWA LA) for the launch of the first PlayStation for Sony Computer Entertainment. Born from a need to combat huge target cynicism the insight was that people reject things pushed at them but seek out things that elude them. Chiat/Day created a 'stealth' campaign to go after influencers/opinion leaders, using street teams for the first time in brand marketing and layered an intricate omni-channel web of info and intrigue. Insiders picked up on it and spread the word. Within 6 months PlayStation was number one in its category—Sony's most successful launch in history.