I didn't see it mentioned, but another great use of an alum block is for getting a grip, literally. Keep the block at hand when saving. With wet fingers, a simple touch on the block assures that you'll have a sure grip of your razor should a little soap get on the tange or scales. But what I really like is that by rubbing the bock, even slightly, with the fingers of the other hand, I can stretch the skin without an inadvertent slip, and stretched skin can improve the shave emensly. Also, when finished with your shave, use the block like a bar of soap you'd wash hands with, then rinse you face with water and hands. Removes soap like you'd not believe, especially if you have soft water that just won't cut the soap. And it does those other things that members said. The essential alum block!