An easy way to grate a citrus for zest (without grating your knuckles!)

I find it easiest to zest a lemon by first cutting it in half and juicing it. That way you can easily hold onto the lemon while you use your grater, by putting your fingers right into the lemon. I cut the stem end of the lemon off too. That allows you to zest without worrying about getting that brown bit into your little pile of zest.
Do you have an easy way to grate lemons or other fruit, that you’d like to share?