Fly fly, but not away, Sing, sing, here to stay

My vocabulary is very limited if a basic one is used. The elementary leetspeak elicited giggles when abused. Some people can do without me, mentally solving their dues. But others use me for simpler things; they have no time to lose.

Fade to black: me. A trap: me, mostly when stamped with ACME. Used to fold in, your form, lay it on me and smack me. But only when hot, Blade face to face, you attack me.

Though I may have a leaf or two And I may be made of wood, I am not a tree that grew. I'm where you set your food.

First three don't turn on, while the last three are a form of water. Some travel to it, some do it from home, either way, the tasks done, take their toll.