Ebooks are one of my favorite sources of passive income. Now, you can do this the simple way and just publish it on Amazon's KDP. Or, you can go all out and build yourself a book funnel. Book funnels are powerful, but they won't be fully passive. For example, if you do a free-plus-shipping offer for your ebook (converting it into a physical book), you'll need to create some one-time offers (i.e. extra training) and up-sells (i.e. an audiobook). But, a book funnel can be very powerful.
I wholeheartedly agree with #2!! I never realized how much of an impact dirty carpets could have on the work place. My company recently switched to professionals who specialize in commercial dry carpet cleaning and it has made such an impact on the environment we work in. Definitely something to look into! They have some awesome information on their site. https://www.chemdrysantaclaritavalley.com/commercial-carpet-cleaning/

I wouldn't think of a high yield savings account as a source of passive income but your savings should be getting something (less like Seinfeld syndication residuals and more like a commercial jingle residuals!). It won't make you rich but it's nice if your baseline, risk-free rate of return on cash is 1% or more. The best high yield savings accounts (or money market accounts) offer higher interest rate and there is absolutely no risk. CIT Bank currently leads the pack with the highest interest rate.

Sugardaddie is also exactly what the name suggests. The site focuses on millionaires, sugar daddies and the women that would want to date them. There is a strong emphasis on relationships that benefit both parties. The site offers few specifics but the implication is that they pair attractive women with rich men. How well this works in practice isn’t clear but the site (and the underlying concept) seems to be popular.
I just wanted to say how nice it is to see such a positive exchange between strangers on the Internet. Seriously, not only was this article (list) motivating and well-drafted, the tiny little community of readers truly were a pleasant crescendo I found to be the cause of an inward smile. Thank you, everyone, and good luck to you all with your passive income efforts!! 🙂
In addition, you must know how much you want to earn by joining affiliate programs. Will it be your main source of income or just an additional one? For the first scenario, you should consider promoting products that are expensive and, consequently, that can bring you a good profit. If you plan on the second scenario, you can opt for affiliate programs that pay for sign ups or affiliate programs that pay daily.