I quit back in June. I just woke up from a long night of partying/drinking and smoking and decided I was done with smoking and haven't touched one since. I have gained about 10 pounds though which I would rather have the extra wieght then smoking. I go to the gym 5 days a week and I' m now able to more cardio then I use to when I would smoke.
The hardest thing for me when I quit was when I would have some beers or go out it was really hard not to smoke because to me thats when a cigarette tastes the best. But I'm over it now and I don't even think about smoking a cig when I drinking now.
You can do man, it just takes allot of will power thas for sure.