you can try some gas-x BEFORE You get gas. I like to take them everyday. It will help after you get gas, but it helps to keep me from getting it at all.
I am not sure if you could do this at work, but lying on your back and sort of bicyling your legs helps alot, or pulling your knees up to your chest and then lowering them over and over, also walking, and rocking back and forth.
think of things that people do to comfort babies, lol. suckign on something can also help, i wouldn't suggest a pacifer at work though, lol. it needs to be something that air won't get in aroudn though.