This is a small jig I built to help when working on doors or large pieces of timber and boards. I was giving a friend of mine a lift replacing 12 internal doors. This involved planing to width and fitting hinges. Without this small jig it would have been a very difficult job holding the doors while doing the work, but with it, it was an easy one man task.
The jig is made by glueing together two pieces of scrap 1" plywood and cutting out with a jigsaw. One thing to be aware of, make sure the angle on the wedge and the angle on the main body are the same, otherwise you will not get a good square grip on the door.