You're going to get the usual answers, which will be different flavors of find & talk to users. I will offer an unusual answer. This isn't 2009 anymore. All th

You're going to get the usual answers, which will be different flavors of find & talk to users. I will offer an unusual answer. This isn't 2009 anymore. All the low-hanging startup, app, and SaaS fruit has been snatched up. You can't just "make cool things" and look for people to buy them. There's too much noise now. Too much competition. No one cares. If from the outset you don't already know who you're selling to, how to reach them, with the certainty that your offer solves some pain-point, and with the certainty that people will actually pay for it, then you're better off just buying lottery tickets. Probably have better odds of success that way. And the only way to have that certainty is to already be knee-deep in whatever domain it is that your app is a part of.