I fast once every 3 months for 2 weeks. This enables me to do a number of things:

1. Keep respect for the weed - make sure I continue to remember why I really enjoy it...
2. When I fast I drink lotsa spring water and lemon juice, and eat lotsa tomatoes - helps to give the body a good cleanse out...
3. I tell my bud smoking friends - so they know - the only was to quit (even for a while), is to get away from the temptation...

Its true that when you are bored - the urge to smoke becomes greater ... but giving yourself a target, a timescale and a mission (detox), makes it easier - and like lotsa people have already said - don't do the things that you normally associate with smoking pot ... gotta change all the habits son!