One way to pack lighter is to wear what you might otherwise stuff in a bag. SCOTTEVEST “gear management clothing” allows you to get lots of tech gear out of your bag and into your jacket or vest. They have some interesting stuff. The pants wouldn’t do you much good at the security checkpoint since you have to empty your pockets anyway, but a jacket can be removed and sent through the x-ray machine. Subracting the weight of your phone, iPod, PDA, AC adapters or chargers from your carryon might help you beat some of the tough new carryon weight limits.