A seemingly useless skill, this is a great party trick and especially entertaining at the bar.
Note: This talent takes a great deal of patience, but with persistence and a steady hand, you too can master the art of "cool when drunk" party tricks.
Step 1: Set Up
Use plenty, after you do this a few time you'll know how much to use.
After pouring the salt out, bunch it into a little clump as shown. (fig.2)
Step 2: Balance
The first time I tried this it took about 15 minutes, DON'T GIVE UP. Unless you want to.
Some tips you can use are:
Be sure you're on a flat surface
Push the salt shaker down into the salt (to get it to stick)
Breath in through your nose, out through your mouth (slows down the body to provide a steadier hand.