Today I begin my attempt to quit. Not that I hate the habit, but I just want to quit while I'm ahead. The worst part is how it becomes habitual. For instance, I need to find something to do on breaks at work rather then smoke.

As far as how long it stays in you, Nicotene stays in your system for about one or two days opposed to Marijuana's THC being a month. But the residue and damage stays for a while longer.