The ideal user is someone who has been building the same thing. It's the guy who's using an excel sheet or wiki to manage their D&D sessions. It's the modders who who have been making fancy, expensive hacks. I personally don't start until I find these communities.<p>I tried making a grocery price comparison app once. There were tons of these though, and nobody really wanted one. It's just something they'd find useful. So I flipped it, proposed recipes that export into grocery lists. Again, no community. Then I searched around for recipe sharing communities and found one that did low carb diets. I bundled their recipes (with credit) and shared it to a FB group. I got 1000 downloads in the first 24 hours. People on the app kept asking about where they'd get the ingredients. 3% of the app users bought something. So it worked out and ended up a business for over a year.<p>Even if this doesn't work out exactly, I would say it's easier to start with the sales channel, and then work backwards. If you're making a game, figure out what kind of screenshots or name would make people want to try it.
#1 Consider searching for "sell the sizzle"
#2 Never forget who pays your wage; your clients.
#3 The Pareto principle is often important ...
<a href="https://en.wikipedia.org/wiki/Pareto_principle" rel="nofollow">https://en.wikipedia.org/wiki/Pareto_principle</a>