I doubt he/she was too bored. Checking the winds, fuel log, trying to reach someone on the radio for position reports, rearranging the 'plumbing' on the extra fuel bladders installed for the flight, etc....
Once, I was the Copilot on a 767 flying MIA-MAD. There was a single engine Cessna flying from Newfoundland to the Azores who was having trouble with his Loran (this was 30 years ago) and had been dead-reckoning for a few hours and couldn't make contact with Santa Maria radio. He called out on Freq 123.45, found us and we relayed to Santa Maria on HF for him. He found an island in the Azores but not the one he wanted. However, he now knew where he was for certain and found his destination. Fast forward two days and we're flying MAD-DFW. There he was, on his way to Portugal.