When I am out or have to quit for a while, it helps me to take a little St. John's wort. I still want to smoke a bowl, but the anxiousness goes away and makes the craving more managable for me.
Del's right though. The best thing to do it to get your head in a different place. Go for a walk, do some art, play a video game. Anything that keeps ya from thinking about it.
Good luck to you~
*frenchy