If using a blow dryer you direct the heat at its head for a bit to make it warmer than the body. When I thaw my rodents I put then in little plastic baggies and thaw them out in the fridge. When i need to feed I warm up some water in the microwave (but not to boiling) and put the bag with mouse in it in the water. When it all gets warm I take it out, reheat the water and then hold the mouses head in the hot water for a little bit. Never microwave the mouse itself.

You can buy feeding tongs at pretty much any pet store that sells snakes and/or their supplies.