I have oil and gas royalties I inherited from my great grandfather that pay 10,000 to 15,000 per year depending on energy prices.
I also own a tiny percentage of a locally owned company that last year generated 34,000 in passive income after tax to me. I don't do any work for this company and have no say how its run. This income is entirely passive. My dad knows the owners and we both made a small investment at at the startup several years ago and it has really paid off year after year.
I guess its not really helpful. Both of these were almost pure luck. :/