I don't fly often, But I must agree with Russ to many people abuse the free carry-on luggage policy's. A carry-on bag should be no larger than 24 inches long, 16 inches high and 16 inches wide. That is large enough for me to fit inside it
1 T-shirt 1 Pair of Socks & underpants, 1 Sweater, 1 pair of jogging pants and a deodorant stick. Then I can add a small sewing kit, a small first aid kit, a travelers toiletry kit. Plenty of room for a Bipap, Cpap Machine with humidifier (minus the oxygen tank airlines will provide one most of the times as long as it is medically necessary) a Nintendo game-boy plus a few games 2 sets of batteries and a battery charger.
Lots of room for a double A travelers alarm clock. 1 all in one digital camera and a spare battery plus charger & room for memory cards, room for a crossword, word search or puzzle book and pens and a portable CD player or Walkman lots of little pockets for a Ipod or Mp3 player & a cell phone Then there's some room for a comic book and a Dan Brown paperback novel.
a little room for a small mag-light one of the 2 AA variety's or 2 AAA variety's and a little room leftover for a 26 ounce bottle of vodka.or a bottle of water and a playboy magazine if you roll it around the bottle of water.
I can fit all that into one small portable carry-on bag. take's very little time to pack just takes time to think it out and place it right. lots of little bags placed in a bigger bag, it only takes 10 minutes to pack. once you have it all set out, it will fit through a X-ray machine. Just remember to take out your digital camera and any spare memory cards before you put it through the X-ray machine.