Begin at a corner near a window and work away from the light, so that the paper edges don’t cast a shadow if they overlap.
We also suggest choosing your starting point somewhere where you can get a clear, full-length of paper going from the ceiling to the skirting board — nowhere with doors, ledges or sockets to work around.
If your paper has a large, bold pattern, it’s best to hang your first length of paper on a focal point in the room, like a chimney breast.