In Eric Reis’s The Lean Startup, a fantastic book about how today’s entrepreneurs and startup companies are approaching the way they create and innovate, Eric talks about how vital it is to use validated learning and scientific experimentation to be able to steer a company in the right direction. In other words, to use customer feedback and quantified data analysis (of real, non-vanity metrics) from a minimal viable product to make decisions and pivot a business one way or another.
If you're an expert in your field, you can generate income by answering people’s questions online. Just, for instance, allows you to join their team of experts and serve a customer base of more than 20 million people. If you’re a travel expert, check out They have great reviews and positive commentary pretty much everywhere.

Renting value is exactly what you do when you go to work every day. This is a great way to adhere to our rule against one-time consumption, although you can only rent something to one person at a time (drawback). By renting something, I can generally avoid degradation of the value, or at least lessen it. By renting you a house, I’m charging you for the value of the shelter and comfort, and in fact incur pretty minimal decrease in value as your usage of the house causes wear and tear. When you’re done renting the house, there’s still plenty of value left to rent out, and the fact that you’ve enjoyed a year or two of value doesn’t much matter to the next willing consumer.

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." 

When I sold my company, the buyers were both thrilled and surprised that I was willing to accept such a large portion of the proceeds as structure payments. For 5 years, I received a monthly check, including interest, for the sale of that company. I created the value a long time ago, added a little more value by allowing payment over time, and thereafter that value was paid on a schedule.

Personally, my experience with Amazon thus far has been good - a few of my short eBooks generate steady passive income on weekly basis with zero additional effort from my side. One thing to note though - Amazon pays 70% royalty on each eBook sold only if your eBook is priced between $2.99 to $9.99. Less than or higher than that pricing structure, the royalty decreases to 35%.of your book’s listed price.

Do you have stuff in your basement, attic or garage that's collecting dust? If you do, pack up the SUV or car and kids and go to a flea market. You could make a couple of hundred, even thousands, of dollars, depending on what you're selling. You'll want to go to flea markets every weekend or at least every other weekend. Make an event out of it, and show your kids how easy it is to earn money selling their stuff.
The challenge I’m facing and, I know it’s a good problem, is that the SF real estate has shot up about 35% in the last couple years. I’m sure you’re experiencing the same thing! So as the net worth is rising, the yield on the total portfolio is going down. Right now, it seems the only way to increase the passive income will be to raise the rent in December and to invest some of that cash in stocks, which I’m nervous to do in this market. Current allocation:
Michael Ellsberg is the author of The Education of Millionaires: It’s Not What You Think, and It’s Not Too Late, which is launching from Penguin/Portfolio in September. It’s a bootstrapper’s guide to investing in your own human capital at any age. Michael sends manifestos, recommendations, tips, and other exclusive content to his private email list, which you can join at Connect with him on Twitter @MichaelEllsberg and on Facebook.
My favorite type of semi-passive income was rental property because it was a tangible asset that provided reliable income. As I grew older, my interest in rental property waned because I no longer had the patience and time to deal with maintenance issues and tenants. Online real estate became more attractive, along with tax-free municipal-bond income once rates started to rise.
John has a daily (yes, daily) podcast where he features an interview with a successful entrepreneur. Now, John enjoys many hundreds of thousands of downloads per month, he’s written a book, has products and has opened up a ton of opportunities for sponsorships and partnerships that wouldn’t have come otherwise. He’s not the first person to have a show dedicated to interviewing rock star entrepreneurs—not even close—but he’s definitely the fastest to see these kinds of results.