I've had some addictions in the past and I always quit cold turkey. However, I realize this isn't necessarily the best way to go for some people. Something I know people have had success with is to try smoking one less cigarette a day. If that's too hard, try every two days.

Since you say its more the ritual, try replacing that "smoke break" with something else. Take a book outside for 10 minutes and don't smoke that time. Then gradually replace the smoke creaks with something else calming or soothing that helps you relax. Chew gum, play with a chinese finger trap, read, go for a short walk, pick some flowers, I dunno, whatever works for you.

Everyone is different so I have no idea if that will work for you but hopefully it can be somewhat helpful