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).
If you know anything well, a place, how to fix something, how to make something, how to do something, you can write a guide for it. You can sell your guide as an e-book, offer it as a download for a fee on your site or reach out to bloggers with similar content and ask if they will offer it as a paid download on their website (for a price of course).

What's crazy is that my book income is more than my SF condo-rental income. Yet I didn't have to come up with $1.2 million of capital (the minimum cost to buy my condo today) to create my book. All I needed to create my book was energy, effort, and creativity. I truly believe that developing your own online product is one of the best ways to make money.

Passive income differs from active income which is defined as any earned income including all the taxable income and wages the earner get from working. Linear active income refers to one constantly needed to stay active to maintain the stream of income, and once an individual chooses to stop working the income will also stop, examples of active income include wages, self-employment income, martial participation in s corp, partnership.[4] portfolio income is derived from investments and includes capital gains, interest, dividends, and royalties.[5]

Gain on the disposition of an interest in property generally is passive activity income if, at the time of the disposition, the property was used in an activity that was a passive activity in the year of disposition. The gain generally isn’t passive activity income if, at the time of disposition, the property was used in an activity that wasn’t a passive activity in the year of disposition. An exception to this general rule may apply if you previously used the property in a different activity.

In order not to succumb to that, Flynn says it’s important to know your motivation. “Passive income is important to me not just for the financial security but so I can spend time with my family,” he says. “I’ve been able to work from home and witness all my kids’ firsts. I have a one-year-old and a four-year-old, and that's what drives me and gets me pushing through those hard times and why I keep creating new products and why I want to help other people do the same thing.”

Those who don't meet this test can qualify for a limited $25,000 allowance for losses if they qualify as an active participant. Active participation requires only limited activities, such as approving new tenants, setting rental terms, and approving payouts. If you qualify, you can then take up to that limited amount of loss each year, carrying over any excess losses until you generate rental income to offset it.
One of the most appealing options, particularly for millennials, would be #12 on your list (create a Blog/Youtube channel). The videos can be about anything that interests you, from your daily makeup routine (with affiliate links to the products you use), recipes (what you eat each day) or as you mention, instructional videos (again with affiliate links to the products you use). Once you gain a large following and viewership, you can earn via Adsense on YouTube.