Many smokers light up when drinking alcohol or eating particular foods. Adverse reactions to a food can increase your craving. It's an substitute to smoking and will take your mind off it. Choose healthy foods as discussed above. Don't replace one bad habit with another.
Many people become chocoholics when giving up smoking.
Eating healthy will avoid weight gain. These will increase your energy levels. These are common in the first 3-5days of withdrawal. The herb St. John's Wart is very useful. Take a really good antioxidant to combat free radical damage.