My simple advice is to stop looking for ideas and to start looking for problems. Look for the pain, and to do that talk to people. The challenge will be that most people accommodate the pain in order to get something done, but they don't like it. A recent pain point I came across was that 501.c(3) organizations are good at organizing but often poor at "the Internet". That suggested that if you talked to a half dozen…
>My simple advice is to stop looking for ideas and to start looking for problems. I concur, and add that HN could really help OP by complaining about random stuff here. Just complain about the first thing that comes to mind that's been bugging you, OP will really appreciate it!
How is that a startup? I dunno, maybe there's a small part of that big problem that you can start tackling. Maybe it has to do with some facet of the economy you're improving/making more efficient, maybe it has to do with influencing policy. That's for you to figure out.
Find a big, big problem, and then look for a manageable chunk that your team can execute an idea on. You're in this for the long haul, right?