Does anyone know a good way to learn how to use power tools safely?

Does anyone know a good way to learn how to use power tools safely? Can someone recommend any good games on Android with good storyline? I would like some help with choosing my next phone. I need help choosing between two budget cell phone plans. Is there any rhyme or reason to the number of times one's comments have to be approved before they show up as auto-grey? The lowest volume on the Galaxy S III for music and calls is way too loud. I was wondering whether anyone had any good wallpapers to...