Just stop putting them in your f***ing mouth. Read the stats, look at the photos of diseased lungs. Think of this weird world where the tobacco barons wear suits, are immensely wealthy and deemed respectable, yet they are the most lethal drug dealers in the world.
I stopped after reading Alan Carr's book How to Stop Smoking. What did it for me was his argument that people smoke to help them with stress. But the truth is smoking actually INCREASES your stress. Think about it.
Stop being a weak mug.