I can't believe I didn't have one of these tools years ago. I first saw the Microplane Zester/Grater on tv and the chef in the program easily grated some garlic into her dish.
A while later I was in a kitchen gadget store and they were displaying this grater along with some lemons. After only a few swipes back and forth I was sold.
This grater works well on citrus fruit rinds, garlic, ginger root and also whole nutmeg.