I own a small Makita variable speed cordless blower. This is a quality unit and the variable speed allows you to place debris wherever you want it. I can actually blow off the stationary tools and move the dust to a pile on the floor. Next to the drill and impact driver, this is the cordless tool I use the most in my shop. Hard to imagine not having it. I also have a Makita two battery blower which is more powerful, but I use it considerably less as it is two speed and not as controllable.
Great for blowing out the bed of the truck and, as others have mentioned, stoking fires with air.