The number one trick to if you frequently have the problem of not being able to get back to sleep – particularly in the last two hours before arising: do not look at the clock.
You can turn the clock away at bedtime. The alarm will still go off. You can eliminate all clocks between your bed and the bathroom. It will take anywhere from one week to two months to change the habit, but it works. Average sleep gain for 453 participants after six months was almost 30 minutes. If you take that number apart, figuring that some people will have sleep problems that require more serious intervention, you can figure that some significant percentage of the test subjects got 45-60 minutes of improvement.