I hate to tell you but the most important part of sleeping well staying on a schedule...even on weekends. If wait until you're sleepy to go to bed you'll end up staying up late.

Get in bed and read or listen to music. This may sound ridiculous or even insulting, but you might need to consciously close your eyes. My doctor told me that once and I got in a huff. It seemed to obvious and simple. But after I thought about it, I realized I wasn't do it. Now if the tv is on I close my eyes and just listen instead of watching.