A bowl of cereal, with lots of milk. I actually don't feel terribly hungry at that time of night, but if I don't eat right before going to bed I'll wake up in the middle of the night with tummy ache and baby kicking me to get up and eat something. But in the middle of the night, I don't want to get up - I keep thinking I'll fall back to sleep if I lay there long enough! It's just silly... So, I must remember to eat something substantial before bed every night.