How to drink tequila like a happy partygoer:

Most people drink it with salt and a slice of lime, or sometimes lemon. Purists may poo-poo the idea but this has never diminished the power of a game or tradition over partially drunk people.

You will need:
One Shot of tequila.
One Slice of Lime.
Some salt.

Lick the side of your right hand, the fleshy part between the thumb and first finger. It'll be upright when holding the shot glass and that's important. Pour some salt onto the wet patch, it'll stick there. Then pick up the shot in your right hand and the lime slice in your left. Then quickly:
Lick the salt, down the shot and bite into the lime slice.

This should preferably be done in a group of three or more people all at once with much cheering and grinning.