try slowly eating a banana an hour or two before you go to bed ...don't know why but it works for some people. could be to do with the fact it helps balance sugars in your body as it is a slow release food.
Bananas repeat badly on me so I can't try it.
if you are asthmatic sleeping with a fan on in your room could help.
make sure your room is not too hot or too cold and your blankets are large enough to tuck around you too as draughts will wake to up otherwise.
I wake up at least twice each night to physically turn over as I am unable to do so in my sleep and I spasm for over an hour each time so every morning I feel like I spent the night in the boxing ring! I actually sleep much better with the TV on