you can always just look for complaints -- online or in real life -- people complaining about whatever represents 'problems' that you might be interested in solving.

i read a lot of anarchist stuff many moons ago and it seems to instill a pretty strong sense of -- "well this thing is bleeped up, and someone should fix it, hey maybe we should fix it, hey if i can't find anyone to help maybe i should just fix it" mentality.

now, it's never _worked_ for me in terms of - i've never had a successful business - but i have no shortage of the bazillion things i'm trying to fix -- problems that need solving, imo.