Use one of the squeezed lime wedges to moisten the rim of the desired serving glasses.
Then, place the serving glass upside down into the plate of salt or sugar making sure that the rim of the glass is coated with the sugar or salt (I like a lot of sugar so I twist the glasses around in the sugar a few times to give me a thick sugar rim).
Serve the drink over ice.
Garnish the rim of the glasses with lime wedges and placed some sliced limes in each glass.