Drinking more alcohol than your body can handle is what leads to a hangover (and not consuming cheap booze or "mixed" drinks). If you're prone to having one too many, there are certain things you can do to reduce the effects.
Take action:
Never starve yourself before drinking – a full stomach slows the absorption of alcohol; include ice cream in your party night diet – high blood sugar levels, coldness, and foods rich in protein and fats can slow alcohol's path to your brain; and stay away from pickled herring and cheeses like Gorgonzola and Roquefort.
None of these suggestions will decrease your level of impairment, so regardless of how you feel, if you've been drinking, don't drive.