Try to go for high carbohydrate foods and fruits. Fruits have natural sugars, banana's for example give a high release of energy over a long period of time. Carbs too, so bread, pasta's, cereals.
Try to stay away from fatty foods which burn quickly, leaving you lemon like by mid day =P
Also are you sure your good night's sleep is down to food?
@Thunder: It's ok. Good in things, awful on it's own. For example, purée on pizza, sauce in pasta, flavouring in other foods, tomato then is really lush. On it's own, bleeeeeeeeeeeeeh XP