Affiliate marketing. If you have a blog or website, you can earn a commission when visitors click on a link, or purchase something you advertise or recommend on your website, either on Amazon or another participating vendor. The cost to maintain your blog should be about $10 for the domain name, plus about $100 annually for hosting, says Michael Alexis, growth marketer and consultant in New York.

I have had a LC account for almost 2 years. Invested 5k. A lot of very small loans. Unfortunately I had to invest though Folio FN. The fees reduce your return. Now, they are not even allowing that. My interest and return of principal are not being reinvested. I talked with LC and they are working on it for my state. Even if I can obtain access to the prime portfolio, I would only place 10 percent of my cash here and would reinvest for at least 3 years. I am still concerned about what would happen when a recession hits.

Software is one of the most lucrative passive income streams but most online entrepreneurs shy away from it, mainly because of the technical aspect that is involved. The truth is that you don't need programming skills to build a software; the whole process can be outsourced fairly easily. You do need to know how to pick a good developer and, of course, have a winning idea that customers are willing to pay for.
Investing in coins and collectibles: Buffalo nickels and Spiderman comic books are good examples of coins and collectibles that can rise in value, and thus offer opportunity for passive income investors. You'll need to get up to speed on the value of any coin or collectible under consideration, but once you do so, you're on the way to price appreciation on a commodity you'll be paying a lower price to buy, and will garner a higher price when you sell.
Do you watch real estate reality shows? Have you dreamed of fixing and flipping houses? What about being a landlord? Believe it or not, real estate is a good way to earn extra income. Real estate investing includes fixing and flipping houses. This requires capital in the form of cash and/or credit. If you can partner with someone, do it. You'll attend housing auctions and bid on houses; you can get them for a good price. Hire a contractor to fix up the inside and outside (could cost anywhere from $10,000 and up), have the house appraised, sell it, make a profit and split the profits between you and your partner(s). Of course, you could buy properties (e.g., houses and apartment buildings), and become a landlord. Another alternative is to become a real estate agent. Speak with seasoned investors and realtors to find out if this passive income strategy is right for you.
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.

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2. You clearly have plenty of money already. Just more padding in your already cushy nest. This is not the story for a lot of people. Your title should be “How to become richer than you already are without working.” But, actually the investment one is the only one that would make money without actual WORK. Running rental properties is a lot of work, and so is running a business, or even a blog. Sooooo…..while there might be some truth to this, I think it’s mostly grass that looks greener because it’s on the other side of the fence.

The most liquid of the private investments are investing in equity or credit hedge funds, real estate funds, and private company funds. There will usually be 6 month – 3 year lockup periods. The least liquid of the private investments are when you invest directly into private companies yourself. You might not be able to get your money out for 5-10 years, depending on the success of the company and upcoming liquidity events.
Stock dividends: Some stocks, especially stocks from big corporate standouts, pay dividends to shareholders based on the number of shares they own, and the percentage of the stock price on the dividend date. For example, if a company pays out 3% on a stock that's trading at $100 per share, you'll earn $3 for every share of that stock you own. Add it up and that can be good take-home pay as a passive investment.
Non-fiction e-books that educate your potential audience on specific topics like finance, online marketing, and business are going to make you more money than fiction books. Of course, there are always exceptions and you could write the next Harry Potter book, but if you want to create some residual income opportunities quickly, I would suggest you go for what sells first!
I’ve never invested in real estate (except to live in), but am always intrigued by communities like FS who seem to have such a passion for it. My intrigue stems back to my earlier comments that the long term trends in appreciation in real estate are simply not very competitive versus equities, despite what Robert Kiyosaki had to say in his book, Rich Dad, Poor Dad.
* I use Personal Capital to track all my finances in one place. It’s much easier to use their free software to follow 28 accounts on one platform than to log into various accounts to check my balances. They’ve also got great tools for x-raying your portfolio for excessive fees, recommending a more optimized asset allocation, and planning for retirement with their Retirement Planner.