I plan a 10pm snack into my calorie count.
I make one envelope of plain instant oatmeal, and a 100% whey protein shake made with 8oz nonfat milk. I pour part of the shake on my oatmeal, drink the rest. Total calories 300, protein 35g, carbs 34g, fat 4g fat.
If I'm awake in the middle of the night - like right now(thanks to mom, age 89) - and I want something, I'll have a Myoplex Lite RTD(ready-to-drink) chocolate shake(170cal, 20p, 20c, 2f).