I agree re: breakfast. Eggo nutri-grain low fat waffles work for me.

I usually get hungry in the late afternoon so I'm used to having a snack then. But last summer I realized that everyday when I was eating lunch I would be full before I was done with the whole lunch, but ate it all anyway. So I started eating half the sandwich (or salad or whatever) at lunchtime and putting the other half in the fridge. And when I get hungry for an afternoon snack, I eat the second half of lunch. This has cut a couple hundred calories out of my diet every day, without making me more hungry or feeling deprived or anything.

Similarly I realized that I tended to eat everything that was on my plate for dinner even if I was full before I was done. So now I put less on the plate to start with, and it's usually enough to get me through until breakfast. If I do get hungry at night, I either have a very small snack (e.g., a 50-calorie piece of cheese) or I just drink lots of water and that does the trick.

I've also found that prunes make a very filling snack, and they taste good and are a good source of potassium and anti-oxidants. And you will never let yourself go crazy and overeat when you're snacking on prunes.