I love the fiber one bars and brownies. I got some land o lakes cheese that's (I think) 90 calories a piece and very good. Oikos greek yogurt (I get the full fat kind even though there are only three flavors that I can find) is a huge favorite of mine.
I find that I do a lot better if I have stuff available to grab in a variety of snack preferences so if I have a craving I can satisfy it without eating something that will throw me way over my calories. So far that's working for me.
What do you keep around to grab in a pinch, or to fulfill a craving?