Many of the things I would be tempted to describe (and am seeing others here describe) as passive income aren't, at least in the strict sense: http://www.invest

Many of the things I would be tempted to describe (and am seeing others here describe) as passive income aren't, at least in the strict sense: http://www.investopedia.com/terms/p/passiveincome.asp http://www.investopedia.com/terms/p/passiveincome.asp In the colloquial sense, I made about 18k last year off of money I dumped into Betterment a while before. I don't do anything but periodically check on how much money I've made. I wish I'd started passively investing about a decade earlier. If you have anything beyond an emergency buffer just sitting in your checking account, just do it.