Melting chocolate is easy.
Use either a double boiler OR a pot of barely simmering water over which you've fitted either a Pyrex or a stainless steel mixing bowl. Add your chocolate in the top and gently melt until almost all of the chocolate has melted and then remove the bowl from the heat. The residual heat will help melt the last bits of unmelted chocolate.
The secret to great melted chocolate is to NEVER get any water in the bowl. The water causes the chocolate to seize up, so just make sure to use a large enough bowl on the top and to have the water on at barely a simmer. :) You should get beautifully melted chocolate this way!