Start by sitting. Bop your head up and down, shake your shoulders a little and get used to moving to a beat.
Step2
Leave everything behind. Before entering the dance floor, leave behind drinks, cigarettes, cell phones, cameras and friends who are too nervous, shy or "cool" to dance. If you are a woman and you must bring a purse to the club, find the smallest, most unobtrusive purse possible to carry with you onto the dance floor. Better yet, leave it behind for your "cool" friends to safeguard while you dance your behind off.
Step3
Stay mindful of those around you if you are dancing with several of your friends on a crowded dance floor. Avoid large ballroom, tango or other partner-types of dancing, where you're likely to slam into other people.
Step4
Lose the self-consciousness. No matter how badly you think you're dancing, there is definitely someone out there who looks far worse than you.
Step5
Sweat a lot. Sweat is the one true sign that you are having a fantastic time on the dance floor. And sweat coupled with happiness is far more attractive than perfect hair and makeup coupled with anxious desperation.
Tips & Warnings
Dance to anything with a good beat, even music you normally wouldn't listen to.
Sing along to songs you know.
If the dance floor is empty, get up and dance around the whole thing. Others will soon join in.
Do not bring anything on the dance floor that may stain, burn or in any way bother, harass or annoy other people on the dance floor.
Do not wait until you are horribly drunk before getting enough liquid courage to go dancing. If you are that drunk, stay off the dance floor and on a bar stool.
Do not stand on the dance floor and get in the way of those trying to dance around you. The bar is for standing, the dance floor is for dancing.