I keep carrots on hand or other fresh fruit/veggies (grape tomatoes if they're on sale, grapes a lot, I've gone for celery before but I usually have to doctor it somehow to really enjoy it and then I feel like I'm not being as 'good'). But baby carrots in their nicely packaged resealable 2 lb bags (hey, I get a lot of them) are the easiest. I also try to keep 1L bottles of water on hand. I need to drink more water and filling my belly with that instead of food staves off the hunger pangs a bit longer while I watch the clock until my lunch break.