If you're that bored (or reading, playing games, etc.) you're probably not paying attention, like you should be, anyway. Take a nap, move out and still hunt for a little while, till you feel alert again. The boredom is the killer, though, not just in deer hunting.
I can't recall how many times I've asked someone why he didn't shoot that buck that walked under his stand earlier only to get an answer like "I got bored so I was ..... (fill in whatever you like).