Believe me when I tell you I fully understand where you're coming from. I still think about all the fun times I had taking my 5 minute break from work and meeting and talking to other people I would never have talked to normally. And I remember thinking for a while that I was damaging my ability to work by not going out on smoke breaks... when I had a problem I needed to solve, going outside for a smoke break was where I did some of my best work.
I know it won't feel like the same thing, but keep taking those breaks. Go outside, walk, sit, relax... smoking gives a great excuse for going outside, but not smoking anymore doesn't mean you shouldn't still go outside for those same breaks. After a while, it gets easier to brainstorm without a smoke. (although, for a while, you will still go outside and spend most of your time thinking about how much you wish you were smoking! )
Good luck quitting when the time comes... it's one of the best things I've ever done and nearly one of the hardest things to keep doing. You'll be proud every time another year comes around without a smoke.