Now you've analysed your addiction and accepted what's going to happen when you give up, you're almost ready to take the plunge and finally kick the habit that is doing you and those around you so much harm. Learn how to get organised, change your eating habits and exercise properly - now you'll have the lungs for it! 

One more thing: many people actually find giving up really easy once they've put their minds to it, so get your mind focused and go for it - you'll not look back.