I agree with Kris, sometimes you may find you just need to plan a late night snack into your daily calories. I, too, need to have a nighttime snack so I try to budget around 200 calories. I've found that mandarin oranges (medium sized) and caramel flavored rice cakes have become my go to snacks. I can have 4 of either for 200 calories or less. Sometimes I want more of a sweet (mandarins) and others I want the crunch (rice cakes). The journey is finding what your triggers may be and figuring out the best way for you to handle them.
Good luck, you can do it.