If memory serves, you work in a hospital, right? What do the nurses look like? My almost-ex would aways say that it's no wonder that there are so many fat nurses, because they would graze all day.
What I am trying to say is that nibbling all day hurts just as much. I have found that I can maintain a fairly steady weight simply by not nibbling between meal. I have some fruit, usually an apple or banana at break time, a bowl of cereal for lunch, and then whatever I want for supper. My job usually affords me a decent amount of exercise, along with plenty of distractions to keep my mind off of my stomach if I am hungry. Now that I am laid off, though, that's not so easy.......
Yep- you wouldn't believe the fat unhealthy doctors and nurses I work with- most of whom are half my age. They also tend to smoke and not exercise. It's really a case of "do as I say, not as I do." We've had new health initiatives, like lose weight for cash payments, smoking cessation programs, etc, but I don't think it's had any effect at all.