I've heard rumors that you tend to remember your dreams better if you drink of cup of water before going to bed and if you lie on your back as you're going to sleep. I don't know if that's true or not, but it could be worth experimenting with.

I also remember keeping a dream journal really helped, because memories of dreams fade away within minutes of waking up. My only thing with that is my dreams are so weird that the dream journal I had going quickly became the weirdest and frankly most embarrassing thing I've had to keep hidden.