Have you got any good advice on building passive revenue streams? I for one would love to read more about this; the only people I know doing it are really just putting out MFA pages. Actually creating software and selling it, well that's not exactly passive either :-)
My current passive revenue stream is low, as in I cannot afford to make a living out of it and still have a day job, but it is continually improving ... so I may not be the best source for such advices.
That said there are 3 advices that I've heard and that seem to work for me - (1) it takes an awful lot of time for going from zero to making a living, as in at least 3 years if you're lucky or really good, (2) whatever you do, it needs to be a low-enough effort (as in a couple of hours per week tops), otherwise it isn't sustainable and (3) you must not put your eggs inside a single basket.
Building software and selling it is a great source of revenue. It is also passive revenue. If you're good at building software, then do that. It doesn't matter what you do much, as long as you're good at it. Some people earn indecent amounts of money just by blogging.
