Pick something low gi so it releases at a slower rate in your body (instead of a massive sugar hit)

Good things are a piece of low gi toast, milk (I generally have a milo).

Even though dd is diabetic it works in the same principle - slow release carb just before bed to ensure her levels don't drop through the night.

I've had a complete mind blank on what other types of foods (I'll blame the ungodly hour in replying) but will dig out my book tomorrow and let you know of some more

Definitely steer clear of more "sugary" items though, it will give you a quick hit and not sustain you through the night.