Common folk remedies

The universality of hangovers has led to a great deal of home remedies, preventions and cures, many of which are variations on each other and often connecting with the more scientifically derived remedies above. Common examples include:
drinking a large amount of water before going to sleep.
lining the stomach before drinking (with either food or a perceived protective substance such as milk)(note: many people that drink milk prior to alcohol consumption 'lose' their ability to feel how much they have been drinking.)
taking vitamins before sleep
having a greasy breakfast the following morning
not mixing drink types while drinking (especially beer and wine)
Avoiding pre-mixed drinks such as "Gordon's Spice" or "Smirnoff Ice"
Having yourself a big bowl of Menudo
consumption of tomatoes or tomato juice the following morning
having a "hair of the dog" i.e. another alcoholic drink upon awakening (Note: this may work in the short term but consuming more alcohol will only prolong the negative effects of alcohol metabolism)
(popular in Scotland) consuming the soft drink Irn-Bru, despite the fact that the amount of caffeine in the drink should increase hangover symptoms.
Drinking a raw egg with a shot of whisky in it.