Fight the urges, I mean it's merely a psychological footprint of how previously you dealt with certain things in your life (like stress), try some other methods of dealing with it.
Smoking doesn't aid stress at all, it might sooth a smoker while and just after smoking but within 10-15 minutes they are usually edgy again and looking for another cigarette. It's not a cycle worth repeating for cost, for health and because I doubt you'd ever want to find yourself dependent on something like smoking for dealing with stress as it's similar to Heroine addicts using drugs for escapism (Dependency is a horrid state to be in).
I know what usually cause problems with smokers that quit is other parties, either their partners, work collegues or people they hang with tend to smoke too. This is a problem because of secondary smoke, I mean they smoke a cigarette in front of you and you breath in their exhaled air, this stimulates those regions of the brain that have developed in regards to escalation of Nicotine so you start getting cravings.
It will take a while for your brains to re-adapt from chemical dependancies, The longer you've been smoking prior to quitting the longer it will take, But the brain is a clever organ it can remap it's neural network on the basis of whether an area is stimulated or not, so it's up to you to keep the stimulation from smoking to as near zero as possible. (even memories can play a part in stimulating those regions and of course that's why you get cravings)