You can cut down on smoking with a cigarette snuffer

CaptionA cigarette snuffer is just a small, non-flammable object with a hole through it, a bit like a tiny, non-flammable donut. You put it down on a flat, burnproof surface with the hole oriented vertically. When you stick your lit cigarette in it, the air to the heater is blocked so the cigarette goes out. If you find your cigarette just burning down to nothing in your ashtray without you taking more than one or two puffs of it, just put a cigarette snuffer in your ashtray and put the tip of the cigarette in it, then relight it when you want to take another puff.Here's a random cigarette snuffer being sold on eBay