Bowhunting; What do you use to re-sharpen broadheads?

You can use a broad head sharpener or better yet,if you are using a 3 blade replaceable broad head such as a muzzy or a Thunderhead, the best thing I have found is a ceramic sharpening stick that you insert in a wooden base and the two ceramic sticks up at the proper angle to sharpen with. But when sharpening broad heads with them, just use one stick, leave the broad head on the arrow and draw it down the side of the ceramic stick, then turn the arrow so the next side is against the ceramic stick. Repeat this and check on the sharpness of the blades by dragging it down your finger nail. The blade will grab your fingernail instead of slide down it when it is sharp.It's works well and is a cheap way to make your blades last longer before replacing them.