Avoiding accidents #1: if you think Wow, this looks like something I shouldn't do then don't do it. #2 Everyone, well 99%of the time in that 10th of a second before something happens, you know it's going to happen. This is generally when using tools of some kind. like when that wrench just starts to slip and BOOM knuckles #3 rushing something not good or not paying attention, talking to someone while running that unforgivable table saw, you know that 5 horsepower one with the 12" or 14" blade, or that carving gouge you push toward your hand that's holding the wood you should not be holding and you know it!, or the safety glasses you know you should have on while driving cement nails dumbass stuff but we all do it, have done it, or will do it.