(and if you're a real fanatic, there's even a piece of microwave cookware to assist you--but it's not really necessary)
1 graham cracker split in half
1 large marshmallow
4 squares chocolate bar
Step One - Assemble the S'More in this order: one graham cracker half, chocolate bar, marshmallow, and then top with the second graham cracker half.
Step Two - Place into a microwavable dish. Microwave for 45 seconds. (This may vary according to your own microwave.) Enjoy!