Alcohol consumption associated with cigarette smoking does seem to increase the risk of certain head and neck cancers.
The American Cancer Society has a guideline for reducing a person’s chance of developing cancer and they are:
Maintain a desirable body weight
Eat a varied diet
Include a variety of both vegetables and fruits in the daily diet
Eat more high-fiber foods, such as whole grain cereals, legumes, vegetables, and fruits.
Cut down on total fat intake
Limit consumption of alcoholic beverages, if you drink at all.
Limit consumption of salt-cured, smoked and nitrite-preserved foods.