Find something to do that you wouldn't smoke during (Obviously can't do it all the time lol)
I found a hobby, cake making. I am a low carber so didn't really affect me much until I made a flavour I couldn't resist.
Get out in the fresh air, fill your lungs with the good stuff. My dog has not had so many walks. He was lucky to be taken round the block and now we get everywhere!
Tidy up bedrooms, unless you smoked upstairs it should pass the time away. Plus chance to get windows open and refresh the house.
Try to find your way of dealing without the cigs. Some switch the addiction for e-cigs, patches and gum which are still better than smoking. I chose cold turkey and listened to Allen Carr's self help audio book. It made perfect sense. I chose my date, smoked myself silly and enjoyed every one until I quit.