I have the opposite problem -- a thousand and one ideas I'd love to get my hands on ... but only 2 hands. However, what I'm personally passionate about and/or qualified to work on won't necessarily be what you'd succeed at and enjoy.

What shortcuts have you already invented for yourself? I mean things that you already do instinctively to shorten a process but which nobody else knows about.

What communities, business fields, or hobby groups are you already a part of? Are they unified by destination sites, dominant brands, common subscriptions, and tools that they all use? Or are they scattered? Do they go to a particular source of information already, or do they ask to each other for recommendations? If the latter, then there may be an opportunity to unify information and services under a single umbrella.

Perhaps this sounds more like social media than software dev. But before building new enterprise software, the user base should be clearly identifiable -- even familiar.

2 cents for what that's worth. Good luck!