I also found that listening to music specifically for sleep was helpful to me. If you google "music for sleep", you'll get a ton of choices that have flute music, nature sounds, piano, you name it. You can also check your local library for CDs.
To expand on what FireSprite said about meditation, you can also find guided meditations online for relaxation, sleep, anxiety, and so on. Some you may not care for, but others might be really useful. This site has some good places to start:
12 of the Best Free Guided Meditation Sites
And regarding yoga, the Yoga Journal site
Yoga Videos: Sequences & In-Depth Pose Instruction has some good videos, plus you can find many, many more online.
A warm cup of tea/cocoa before bed can help, as mentioned: A personal favorite of mine is "Relaxed Mind" tea from Yogi Teas.
Above all, remember--this is only temporary. It is NOT the rest of your life. It WILL pass.
Wishing you sweet dreams tonight!