Prep: Cut your chocolate into even pieces or use chocolate chips.
Heat: Place the chocolate in a microwave-safe bowl. Microwave it for 15 seconds at a time, then give it a stir.
Stir and Repeat: Continue microwaving in short bursts, stirring between each. Stop when most of the chocolate is melted but a few lumps remain. The residual heat will melt the remaining pieces as you stir, preventing the chocolate from burning.
Double Boiler
Prep: Fill a pot with a small amount of water and bring it to a simmer. Place a heatproof bowl on top of the pot. The bowl should not touch the water.
Heat: Add the chopped chocolate to the bowl and stir gently until it has melted.