Try :

drink water instead of smoking

find something to do with your hands; a puzzle or crossword, knitting, solitaire with real cards,e tc. yeah guitar is great, but probably not at work

see if you can find a support group, friend or online site to commisserate

don't have coffee for a while, have tea instead. Or try a different '
flavor' coffee to quell the urge.

Take your ciggie money and put in a box to reward yourself with a gift!

Remember this: once the cravings are gone, you won 't miss this habit!
It's easier than dieting b/c you NEED food, you don't NEED ciggies.

Good luck, we're all with you. YOU CAN DO IT!!!!!!!!!!!!!