I'm 5'6 and medium frame. I actually look pretty slender in a size 12, which is about where I'd like to be.
When I'm bored, I try to assess if I'm really hungry. If I am, I try a snack that's filling, like raw Almonds. Sometimes I realize that I'm actually thirsty rather than hungry, so I'll have some water with lemon in it or some Crystal Light. I work a retail job in the evenings for a few hours, and usually when I get home I'm wide awake and have the munchies (because it's been several hours since dinner). I actually don't have a "no eating at night" rule, I just have a "don't be stupid at night" rule. I try to stick to a 100 calorie bag of popcorn or kettle corn, a cup of no sugar added cocoa or one of those decaf coffee powders with a handful of Oatmeal Teddy Grahams. Covers both salty and sweet with minimal calories, and the warm drink and snack actually tend to make me sleepy.
I've just found another appetite suppresent in the last few minutes. 100% cranberry juice. Really. It's sour and a little bitter, and pretty awful. I guess it's the same idea as the grapefruit diet. There are also only 50 calories in an 8 oz glass, and believe me, there's no way I'm drinking all 8 ozs!