I put together a forearm mount for my GoPro using parts from a head mount and an off the shelf elbow support. Left the camera on my arm the whole night, and was able to review each shot after my delivery. I found the ability to instant replay my own shots very helpful and scored above my average for the night.
Picture of the mount:
Video of me wearing the mount (shot from another camera)
Steel Fingers wrist & finger support that I use in the video (due to a tendon injury I had at the time):