Most nights I have a lot of difficulty falling asleep. Usually I try around 11:30 at night and end up laying in bed for hours, usually until 2am or so.
The room temperature is fine, my bed and pillow are comfortable, and it doesn't make a difference. I started playing a bit of music at a low level, and it does help slightly, but not significantly so.
What do you do when you can't sleep? :/