I like the paper towels most. Though, since there are only automatic dryers in the bathrooms at the school I go to, I usually do this:
Put my hands under the dryer
Wave them under the air for a bit
Take off my ring, and put it under the dryer for a bit (My ring starts to slide off my finger when it is wet)
Put the ring back on, and shake the rest of the water off as I leave the bathroom