Problem is, no money. I don’t mind, really.
But I treat every one of my free, open-source (or proprietary) projects as if I am delivering for a Fortune 50 corporation.
Lots of boring bits, but the results speak for themselves.
There was a Show HN, some time ago, where someone made a Web site that cataloged existing markets, with insufficient software.
It was a good idea, but not for me. I like to be heavily invested in the use cases for my work.
It looked for products with a lot of ratings and mediocre levels, which indicated a market that wasn't being satisfied.
The middle of the bell curve would be an app that had 10,000 3-star ratings.
This excluded products being "hate-bombed," and ones being "gamed."
It suggested using the list as a starting point for finding poorly-served markets.
It was fairly clever.