Back in my road warrior days, the kids gave me a pair of Bose noise-canceling headphones for Christmas one year. I traveled across the Pacific 5-6 times per year back then and those headphones helped me survive. I don't think I've touched them since retiring, not even sure where they are. But I'd definitely take them on a long flight again. I have a nice pair of Shure in-ear headphones that I use regularly.
Retired at 52 in July 2013. On to better things...
AA: 55% stock, 15% real estate, 27% bonds, 3% cash
WR: 2.7% SI: 2 pensions, some rental income, SS later