Avoid A hangover by not:
-Drinking Red wine in excess.  Even though red wine is beneficial to your health it also contains more congeners than white wine. 
 Red Wine also contains a chemical called tyramine which has been known to cause headaches.
-Mixing different types of alcohol because your body takes a longer process to recognize and metablize each individual type.
-Drinking Cheap Liquors because more expensive liquors have a more thorough distillation process which removes the congeners.
-Drinking Carbonated Drinks like soda and sparkling wines.  Carbonated drinks will speed up absorbtion of alcohol.
-Drinking Sweet Drinks such as pina coladas, margaritas, and exotic drinks.  The sweet flavors disgise the taste of the alcohol which
 causes you not to really know what your consuming.

We hope these 5 ways will help you avoid a hangover.