Fan and radio. If either is off, I can't sleep! I stream from laptop instead of radio, but it's the same noise. Talk radio. NO music. If it's music I end up being awake jamming along with it! lol This combo also covers the snoring of the bulldog and the hubs.
Same as Debi, talk and/or news radio. Every once in a while I'll listen to an old C2C with Art Bell doing open lines, or maybe a podcast. More often than not, however, I listen to a stream of the BBC.
Fan usually, not for the noise but to circulate the air in the room. I like all the background noises of the outside and the sounds a house makes when all else is quiet. You learn all the noises of your environment and when something out of place sounds you instantly wake to it.
I'll also sometimes sleep with a small lamp on with a low watt lightbulb. Have ever since I felt a presence in my room a few months ago. I only felt it once but it was enough to make me sleep with the light on that night.