[bprieto]

If you have some niche or specific knowledge, you can set up a blog and sell infoproducts (courses, books, templates, etc.). I've done this on the side and there is money to be made. I had earnings of low thousands some months.

But it's difficult to grow an audience, it's hard work to create quality products and even though you can set up an almost automatic selling machine with little coding, just plumbing WordPress, Mailchimp and PayPal, there are still some customer support to be done.

So it's long term, not completely passive income, but if you know something and other people are willing to pay for that knowledge, it can be done.