A Mars bar - plenty of sugar - or a good old bacon fry up - plenty of salt - are the traditional methods.
Basically you need plenty of water to dilute the alcohols in your blood and plenty of B vitamins to help your liver with the recovery process. I usually have Berocca but any multi B vitamin will aid recovery.
Before consuming alcohol in a large quantity again you should consider having the B vitamin before. A meal high in carbohydrates and dairy foods will help to slow down the alcohol entering your bloodstream.