Focus on solving a problem. Find something you actually care about and need to make instead of something that you think sounds cool or that you think might make money. Let those things happen organically. If you actually solve a problem people will tell you that it's cool, and they might pay you for the solution.
> Find something you actually care about and need to make
This is my problem. It's hard to find something that I care about enough to spend time working on it. When I start on something that I do care about, I often find something that already exists that does what I wanted to make.