The constant reaching for the cigarette was the hard part for me...I chewed a LOT of gum and had a glass of water where my pack of cigarettes was and it helped me a LOT. Two good mental tricks for me were 1.) making sure that I didn't ignore the cravings by trying to do something else (you know, "oh, I can ignore it I'll just go eat something/work harder/distract myself somehow") and just realizing/focusing on the fact that even though I wanted one, it was no longer an option for me to have one. And 2.) realizing that no matter how many excuses I came up with to rationalize having a cigarette, none of them were worth finding out I had heart disease/lung cancer/cervical cancer and so on. I just had to keep talking to myself every single time I had a craving. It gets easier, I swear.
Reading what everyone has been posting here helped me quite a bit too...even though I rarely post I really got a lot of comfort from seeing other people going through what I went through too.
Good luck, although you won't need it! You will do great, and post here whenever you feel like you need the support. Everyone here is SO great.
quitting tomorrow/cold turkey 
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