I feel like I need a sort of tape recorder in my head every time I think up something interesting to write about, but don't have the time nor space nor any of the other important parameters. They say that even million-dollar ideas sometimes strike at 3 A.M.
I suppose that's one of the reasons why I carry an iPod touch set to "Notes" here and there - to write down ideas that hatch in my head that I would love to masticate on later - not always reliable, but good enough for now. It just popped into my mind while writing this down that this thought receptacle would almost be like a Pensieve from Harry Potter. I would slowly pour in the thoughts that I've kept aside, and voilà...