Close your eyes!
When I was little, it occurred to me one General Conference that the camera stays running while the prayers are given, and that someone has to operate the camera. I went to my Mom, very concerned about the cameramen who had to keep their eyes open during the prayer. I think she told me that they could just point the camera and let it keep running while they closed their eyes.
When I got older, I also realized that sometimes it really is OK to keep your eyes open during the prayer. But you should still try to be reverent.