Wow! What an awesome list! My favorite is the stock photography because I love photography. I have had some success there, particularly with one photo I make some decent income from. I think the key with stock photography is finding a shot that is high demand. Then, find a new unique way to frame that shot. This is the reason my St. Louis Arch photo is a top 10 on both ShutterStock and iStockPhoto. Thanks for the awesome ideas above!
Reinvest your passive income. Once you've started earning a good amount of passive income, you can reinvest that income to earn ever more. This income will then produce further income that you can also reinvest. This cycle produces ever-increasing income streams without any direct cost to you. For example, you could reinvest revenue from website advertising into more advertising that brings readers to your site. This increase in traffic would then further increase your ad revenue.
Like we said above, there’s nothing passive about this, but if you can create another type of asset — a system for selling products — then it is. One example is to write a book, and use Amazon Fulfillment Services to automatically print and ship it every time you sell a copy, depositing the money in your account. Another example is Tim Ferriss, who hired overseas assistants to handle everything at BrainQuicken, from the marketing to the reordering. With drop-shipping (having the manufacturer ship directly to your customer), this has become easier, but you should know that it’s still a good bit of human labor to advertise, handle customer service, etc. But, it’s a good option, and you can experiment with automation and delegation as you go along. If you want to know more about this, read The Four Hour Work Week already!
If you love design and you are an artistic person, selling digital products on Etsy could be a great way to earn passive income. Digital products require little maintenance, your customers will simply receive a link to download them (which means you don’t have to worry about shipping and returns handling). All you need to do is spend time upfront to create beautiful artwork! (Easy right?)
Who cares? I don’t care one bit about building a “successful company” with most of my passive projects. That’s for my active projects — and I’ve done that when I converted them into active projects. For passive income, I can build products and automated services that are useful enough that people want to buy and use them. My Magento modules and Udemy course had 5 star ratings despite being passive. I knew back then that I could probably sell 2x as many copies of each if I made it my full time job — but I chose note to. I realized that if I could have more fun, get more fulfillment, and make more money out of other passive activities, and that’s why I don’t care that my passive businesses are small and nichey. Again, though, converting one of them into an active business has made it much more successful — so I would just remind you that they aren’t mutually exclusive, and if anything, having a Passive Income side business or 2 let’s you try out a few different waters before you dive in to any one.
I've got a $185,000 CD generating 3% interest coming due. Although the return is low, it's guaranteed. The CD gave me the confidence to invest more aggressively in risk over the years. My online interest income has come down since I aggressively deployed some capital at the beginning of the year and again during the February market correction. You'll see these figures in my quarterly investment-income update.
Once your audience has grown and you have validation that you’re offering them value, there are many ways to create passive income. You could sell digital products like ebooks or courses, take up affiliate marketing in which you promote other company’s products and earn a commission when you sell that item to your audience, build a community and charge people to be a part of it, create software and sell that, among other avenues. Ask your audience directly what would serve them best, or look at what they’re saying on Twitter, Facebook or other websites, to find out what problems they have and how you could help solve them.
If you’ve got a book you’re itching to write, you can still go with the traditional publishing route. (We published our first book using a traditional publisher.) Whether your book is fiction or non-fiction, a publisher can help get your book into print and onto shelves in both online and traditional book stores. This is still a good route, although it may take more work and be more expensive than some other options.
If you have specialized knowledge in a certain topic, you can put together an online course to teach others. For example, if you have experience in real estate investing, you can create an online course “Real Estate Investing 101”. The benefit of an online course is that once you create the course material, you can sell it to as many people as you want.