How to Get Rid of a Hangover

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Steps

Drink two large glasses of water as soon as you get out of bed to get rid of any dehydration. Try to make the water lightly warm, and don't replace water with a drink containing alcohol in this step!
Make a nice, hot bowl of chicken soup, as soon as you have overcome the queasiness. This soup will help replace the salt and potassium, the body loses salt and potassium when you have been drinking.
Get moving. Though you'll want to stay in bed, take a quick walk around your street. A walk by the sea is thought to be especially helpful, possibly because of the fresh air, or the calming ocean sound. You could even take your dog who has had hardly any sleep all night, because you came back around 3am, talking at the top of your voice.
Fruit can help restore nutrition, especially bananas, which contain potassium.
Drink some sort of fruit juice, it contains simple sugar fructose, which speeds up the metabolism of alcohol.

Tips

One trick to try - remember to drink a glass of water for every 1 or 2 drinks.

Do not take ibuprofen or tylenol before going to bed. These drugs are activated and metabolized by the liver which, while busy processing the alcohol in your blood, can be damaged by the drugs.

Drinking lots of liquid or replenishing drinks such as Gatorade before falling asleep can help you avoid dehydration, which is a major contributor to a hangover. (Grape juice is not recommended, however. It's rough coming back up.)

Hangovers are due to the loss of vitamins/nutrients in the body. To reduce this, try to take some multi-vitamins before you go to bed and once again when you wake up. And drink water...lots of water.

If you find that you can not keep anything down, wait about an hour after you vomit to give your stomach time to settle. Then nibble on saltine crackers and sip Vernors or any other ginger ale. Works every time!

Try eating a cracker or an english muffin with honey before you retire for the night. The high fructose level in the honey will break down the alcohol in your blood, allowing it to be processed more quickly.

Eat a breakfast sandwich! They work wonders.

Try a pill called Chaser before, during or after drinking. You can find it at most convenience stores.