3 days and no more nicotine inside your body. That's the goal.
Think about it, you are addicted to nicotine, not the cigarette itself. The cigarette is just a device getting that nicotine to your brain (and it's a very effective one also).
I quit cold turkey and never looked back.
http://www.whyquit.com is the place to go.
It's free, tons of articles and motivation.