I swear by Silencio brand earplugs, available on the Amazon website. I fly across the Pacific and value my quiet sleep time. They are silicon filled, so need to be warmed up so that they will shape and conform to your inner ear. Once in, dampened with a little water to effect the seal, you can have a screaming baby behind you and not care. Between those and my 5 mg of Ambien, I get a solid 7 or 8 hours of uninterrupted sleep. Oh, I also bring along my own small crushable down pillow in a carryon bag, and use it so sleep with against the bulkhead, as well as for the comfort of home in the overseas hotel room.