Don't light up smoke after smoke like that. If you get one you can't suffer through, put it out, relax, have a drink like a nice coffee or maybe a double scotch if you're stressed. Try again later. You can't force it if you're not in the zone. I've noticed that smoking a cigar doesn't work under pressure for me.

My best smokes happen outside during a cool summer evening, after dinner and about two drinks, when the house is empty (read, no wife and kids.) and everything is relatively quiet. I like to smoke with a good coffee preferably, but anything will do. I just kick back and watch the sunset and walk around the house looking at my plants.

Obviously, these circumstances don't occur often.