I'm brilliant at quitting, I've done it loads of times.
Ba-dum TSCHHH!
I'm on my longest quit so far, 9 months. It will be a year at 9:00pm on Christmas Day. I replaced cigarettes with running. I used to get knackered running up the stairs, now I can run for 5 miles without a break.
The first few weeks are the most difficult, but everyone has different experiences. I've had the most success in the past with cold turkey, and also (and this has been most important to me), give up when you're not in your usual life routine.
Seriously, I gave up at Christmas because I had two weeks off...that's two weeks out of the normal routine of things. Many of my cigarettes were routine...the drive to work ciggy, the after lunch ciggy, the after dinner ciggy, the before bed ciggy, the cram in as many ciggies at lunch-time ciggies. When you're out of your routine, they seem less important.
I'm not going to lie...some smokers who don't smoke (which is what I consider myself), come to hate the smell of cigarette smoke in a short space of time. Me...I'll stand as close to anyone smoking a rolled up Golden Virginia as possible, reminisce with a gormless smile on my face, finally remember how incredibly unhealthy I felt, and go get another beer and forget about it.
Good luck!
EDIT:
Oh, and I think you know when you've quit properly when something really crappy happens in your life, and you don't immediately buy cigarettes to cope. That happened to me back in May, so I think I'm there. Not that I'm wishing anything crappy on anyone, but it is a way of measuring how you're coping with life stuff if you can stay off them through the crap times.