Well, often times I’ll listen to relaxation CD’s and other such things of that sort, (one in particular that I love has about 2 Hours of Thunderstorms mixed with soft music) but other than that, I don’t think I associate too many songs with dreams, (well, maybe a few, but I don’t know what they’re called or who wrote them 
)
There’s a topic about a song file that was supposed to help with dream recall and possibly induce LDs and or OOBEs, I found it kind of annoying, but everyone else seemed to like it. Here’s a Link
I’m sure there are more topics with different dream-inducing songs floating around here somewhere, use the search feature to find them.