The first thing to keep in mind when using this great tool is that it can be dangerous. It is a good idea to purchase a rotary cutter that has a lock on it, so that when it is not in use, you can "lock" the blade in the retracted position. The second is that you should take your time! Go slow! Watch where your fingers are and keep them out of the path of the rotary blade. There are also special gloves you can purchase for added safety. These gloves are "cut resistant" and can prevent injury.