That is a nice list of passive income sources. Actually, the most up-to-date list of dividend growth stocks is the list of dividend champions, maintained by Dave Fish. The list of dividend aristocrats is incomplete at best. For example, the dividend champions list has over 100 companies that have managed to increase dividends each year for at least 25 years in a row. The list of dividend aristocrats has no more than 50 – 60.
Selling T-shirts and other apparel is a pretty saturated market but the tools to do it are easy to use, which makes it very quick and cheap to get going. If you’re creative enough, or tap into the zeitgeist properly, you can also have a runaway hit. Even if your first 19 T-shirts don’t sell more than a few copies, your 20th might make up for everything.
Because you’re publishing an eBook rather than a physical book, the costs are minimal. And you don’t have to print 1,000 copies of your book hoping someone will buy it. Instead, you can write your book, create a fancy cover for $5 using Fiverr and publish through services like Amazon Kindle Direct Publishing. Amazon will handle everything for you, then take a percentage of the revenue you generate.

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.