How to Prevent a Hangover
Eat before you begin to drink and snack while drinking.
If you do not eat, coat your stomach with a full glass of milk.
Pace yourself and drink water between drinks.
Drink clear liquors.
Some spirits are higher in congeners (impurities) than others; red wine, brandies (including cognac), and whiskies usually have more than other types of alcohol. Generally, the clearer your spirit, the fewer impurities and the less severe the hangover.
Champagne and mixed drinks made with carbonated sodas allow for faster alcohol absorption; they should be sipped slowly.
Know your limits.
In most states, a Blood Alcohol Content (B.A.C.) of .10 means you are legally drunk—and some states now use the stricter .08 B.A.C. For most average-size adults, this can mean as few as two drinks in an hour.
Do not mix your liquors.
Each spirit has different toxins that must be processed by your liver. It is best not to overload it.
Before going to bed, have a snack of a banana or cheese and crackers.
Keep water beside your bed and drink it if you awaken during the night.