Know any notable dreams you've had, either old ones or recent? Heck, same goes to nightmares. Course if the contents of the dream is on the personal side you don't have to share it.
Me, I've been lately getting a dream every once in a while that has awesome music I've never heard of before, but when I wake up I either forget the song or don't and wish I had some sort of good-quality music program of some sort to attempt to recreate it. And even then I still forgot the song not long afterwards. The most I can remember about the songs is that they wouldn't sound out of place in a battle scene or cutscene.