If you are a photographer looking to diversify your income stream, putting together styled stock photo packages can be lucrative. For example, a package of 15 wedding-themed stock photos for $10. You can then market this to any bloggers or businesses who are in the wedding business for their use (photos of different engagement rings styles are super popular). Through this method, it’s possible to make a continuous stream of income off of photos you’ve taken once (similar to a licensing deal).
Within six months of selling, however, I had reinvested the proceeds from the home sale and brought total passive income for 2018 back up to an estimated $203,724. I'm not sure I would have sold the house without a clear plan for reinvesting the proceeds, since I'm bullish on the SF housing market long term. However, because I did have a plan, and the challenges of raising a newborn and dealing with rowdy tenants left me feeling a bit stretched, I decided to simplify and sell.
I love real estate investing, but it requires a lot of upfront capital plus you are going to have to learn to love your tenants (see point 6 below)! Crowdfunded real estate investing gives you a way to still invest in the real estate market, without having to necessarily put in a lot of money upfront. It’s definitely a much more passive investment than owning a flat or a house!
Another great way to get started is to identify an area of interest you have. For instance, Robert Duff has been successful in building passive income by selling books on Amazon. Then, go out and start talking to people. Ask them, “What are you struggling with right now? What are your biggest pains? What’s something you wish existed that doesn’t?” That’ll give you some ideas about where to get started.
The best way to take advantage of something like Airbnb is to have a separate property that sits vacant all the time. This way, you can just worry about keeping it clean and never have to worry about making sure you’re out of there when guests want to show up. While that’s not always the most cost-effective way (owning another property can be pricey), it’s the best.
Viral marketing strategies often forget about the pre-launch phase of a campaign. A easy way of ensuring that a viral marketing campaign goes viral is to start a conversation online where most of your audience is to build up hype around the campaign before it goes live. Build a plan where colleagues are involved to help get the conversation started. Maybe even include affiliates or related companies, who could gain from promoting the campaign, to help get the word out to as many people as possible. What will this achieve? This is get more people talking and peak their interest so your campaign will start strong and it will cost less to get the momentum going. From launching a teaser campaign to building anticipation through content on social media, pre-launch can sometimes be just as important as the actually promotion phase.
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]

If an investor puts $500,000 into a candy store with the agreement that the owners would pay the investor a percentage of earnings, that would be considered passive income as long as the investor does not participate in the operation of the business in any meaningful way other than placing the investment. The IRS states, however, that if the investor did help manage the company with the owners, the investor's income could be seen as active since the investor provided "material participation." 
The reason to make use or virality, the ease in spreading and sharing, is however a double-edged sword. We cannot forget that in this type of campaign, a large part of the control falls into the hands of the users, and we risk the message being misinterpreted or parodied. On the other hand, a successful viral campaign can work miracles for your brand’s results.
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