I work in an office with people coming and going throughout the day randomly, in and out, stopping to chat or meet or whatever. As such, I can't find "safe" times to chew/spit throughout the day or whatnot...and going all day without anything makes me unable to think clearly by the afternoon. So I needed to do something about that. I've started taking food with me to work, stuff I'll actually eat: sprouts, a head of lettuce, a couple peppers or a box of cherry tomatoes. I've found that if I eat parts of a salad individually, it lasts longer and fills me up way better when I'm starving. So, for instance, I'll eat a bowl of lettuce (with seasonings it can be very tasty), then a handful of sliced pepper. Then a small cup of white, raw mushrooms. Breaking it down into 3 parts feels like more and I fill up better because it takes longer to eat so I actually digest and don't feel so hungry. It's a good way to look like you're eating a lot when you're around others, without actually doing so. Plus it helps you regain your energy when you're getting really low.