I quit 7 years ago. I started by switching to lighter cigs, then I poked holes in the filter so I was getting less and less. Then I started cutting down on the number/day.
My best suggestion is to change your routine. If you get up, have a coffee & a smoke then have a shower (or whatever) try to switch it: get up, shower, coffee- no cig, you smell so nice! Certain "routine smokes" are easier to change. My friend always smokes in her car and she drives a lot, it has become part of getting into the car for her, those will be the kind that are hardest to stop. Try gum or a hard candy or just allow that to be the last 1 or 2 that you quit.
If you can, avoid other smokers for the first 2 weeks, those are the hardest.
It's hard and you have to *really* want to, but you can do it. Good job asking for help. Good luck!