Working nights and trying to loose weight.....help

I work nights sometimes and I always want to get junk food from the vending machine to get me through my shift. I find that packing my lunches and logging it before hand helps me stay away from the vending machine and I always bring some kind of protein bar with me so that if I do need something sweet/chocolaty I can nibble on that. For after work I go straight home and sleep so that when I wake up its like a clean slate for me.