A few ideas:

laptop < 5 lbs with DVD player
MP3 player with good battery life and spare battery(ies)
multi-band GSM phone, unlocked if possible
earplugs, eye mask
heavy duty luggage, such as the garment bags offered by Eagleindustries.com and blackhawk.com
fly heavily on one alliance (ie Star, OneWorld, etc)
good wool/synthetic socks

A true road warrior sleeps cheap and eats well!