Acquire a canning pot. They come with a wire rack for about $18, and for about another $5 you can get the tongs and funnel as well. Jars run about $6-9/dozen, depending on size. Fill the pot about 2/3 of the way up with water, and start heating- there's enough thermal mass that this will take a while.
Bio:Eric J. Wilhelm is the founder of Instructables. He has a Ph.D. from MIT in Mechanical Engineering. Eric believes in making technology accessible through understanding, and strives to inspire others ...read more »