Using A Screwdriver with One Hand

[katy]

If one uses a Robertson (square headed) screwdriver and robertson screws, the screws will stay on the screwdriver, even when horizontal. Ask any Canadian electrician.
https://en.wikipedia.org/wiki/Robert...%20is%20shaken.

[Frank S]

For starting slotted or Philips screws I have a tool that clips in my pocket. When it comes to removing them I usually just grab thehandle and aim in the general direction of the screw sometimes need a mirror to find them though.