I like to buy chocolate made just for that. I think it's called dolche or something like that. It's ususally in the produce section and comes in a cardboard container (round) that you just microwave. You have to be very careful and do it at like 50% heat and stir every 30 seconds or so so it doesn't burn. The container will have directions.
Then wash and yes, make sure they are completely dry before dipping. Then just dip and turn to coat and lay on wax paper to dry and harden. You don't want to refridgerate them though because the chocolate will turn whiteish, so make them as close to the time you'll need them as you can. When they are dry, just peel them off the wax paper and put on your serving plate.