I am a light sleeper and rarely get more than five hours sleep a night.

Try to eliminate anything that will keep you awake or disturb you once asleep; light , noises, smells etc.

Don't have any drinks too late beacuase although you may not have to actually get up in the night for the loo your body will be thinking about it.

Cold feet can keep me awake (circulation doen't run in our family! so a pair of hiking socks at the ready can help.

If your brain is too active then get up and practice some music, when you start to drop the instrument it's time to go back to bed again!