1. Don't Go Cold Turkey
If you've just come back from Vegas or otherwise been eating a lot of junk food, Lipman doesn't recommend going straight to the straight and narrow. First remove the alcohol and caffeine and then tackle the food. "Most people feel like crap the first couple of days of a cleanse – headaches, tired, fogginess – but if you've been eating especially badly it will be too hard to give up everything at once," says Lipman.