Avoid the temptation

If you're trying to quit smoking, surrounding yourself with smokers will inevitably drain your willpower and make you more likely to have a cigarette.

• "This is the reason why, even if you have resolutions about how many potato chips you're going to eat, once you open the bag, it's so hard to not empty it.
• It's because they taste good," he says. "Once you're focusing on that — rather than the long-term issues of cholesterol and obesity — it's incredibly hard to stop."