Ever rub a baloon on top of your head? If you haven't, try it out, it's guaranteed to make you feel like a kid again (and you can zap someone afterwards, you're feeling kind of evil). Notice how it leaves your hair standing on its ends, almost Einstein like? That's what I liken a writer's brain to.
There's all these crazy ideas roaming around in your head, fighting to stand out from the others, leaving you feeling (rather than looking) like a crazy person. Each strand can be brilliant on its own, or can fizzle to nothing. I found something out, if you add and subtract a few strands here and there, you might make something AMAZING out of nothing. I had a few ideas that were just that, ideas. But there was nothing special about them, but I intertwined those 'blah' ideas (dull strands) and poof! You got some volume! As writers, we're kind of a hot mess of hair growing by the second, sort of like what happens to mine when any sort of humidity gets near it. But at times, that hot mess can be that gem you've been waiting for. Don't give up, add a few ideas together to see if they make any sort of coherent story and go from there. I've been known to mesh a couple of them together. If nothing else, you might get a good laugh out of it.