[pmtarantino]

It has to be more than just "worth solving". I can think in a few ideas "worth solving" just like that. It has to be good enough so people pay for it.

A lot of people would like to have X feature, X website, X software. Would they pay for it? Ask that question. For what would you pay for right now?

For example: I am starting to selling goods. I'd like a place where I put all my good purchases from ebay, alliexpress or wherever, and I can track it, see when it will arrive, how much stock I have left, etc.