The last few posts seem to be on to something here...

I'm also in a situation where I've had to give it up, and I've been in the situation many times before in my life... That's what we have to deal with when the legal machine codes our personal habits as illegal, and gives employers the right to invade our privacy with drug testing. Can't remember exactly, but the last time I researched drug testing I came across some info. about how something like 60% of the positive "catches" for drug tests are for pot, compared to miniscule rates for heroin, crack, etc---but that's a different rant.

Anyhow, what seems to help me the most is to prepare mentally for when I have to quit. I know the original post is about being 2 days in already, but this may help too...

I went through a dry phase without any mental prep before, and I couldn't stop thinking about smoking for the first 48 hours, and it was a steady thought for the next two weeks. But the next time I went without, I decided I was going to psych myself up for it constantly before I had to start.

I would just think to myself constantly, "Ok it's great to smoke but I'm in control of it, I'm going to be without for a while but it will be ok and I'll be ok." It sounds kind of hokey, but it really helped. And when I went off the smoke, I would keep reminding myself "Ok I'm not smoking now but I've got THE REST OF MY LIFE to enjoy smoking, this is just temporary, I can get through it easily." Compared to the other times I went dry, I felt a lot less stress and need to smoke---because really it's 95% psychological after the acute effects leave your system. Hope that helps!

Remember, you're always in control of what happens inside your head.