Ideas are like Gold Bullion...I want to keep my chest of ideas to myself, lol!
Seriously though, you may just be trying to hard. I always find that it's the time that I least expect something to happen that it does. Why not Google around the web at various sites...I think there is some kind of random search and see what interests you.
For instance I do a lot of military research. Sometimes, while searching around the net, I see something that peaks my curiosity and off I go to investigate. It doesn't always have to be military related. It's kind of like a treasure hunt, and I enjoy it immensely.
Another thing I do is visit Wikipedia. Sometimes I just go there and type the first thing that comes to mind and see what comes up. There is always a ton of links to various other places of interest.
I know this doesn't answer your direct question, but hope it helps your search, in some small way...Good Luck with your idea, whatever it may be
PS: I just thought of something...I am a senior and we seniors are always seeking out a relative easy site, to learn different things without all the TechTalk. There's a fella on here who runs Window Talk...check out his site, perhaps it will turn on the light!