Readers of this blog know I'm a big fan of traveling light. I've made it to all 7 continents using only carry-on luggage. Here is some more good advice on packing light by Rick Steves:
You'll never meet a traveler who, after five trips, brags, "Every year I pack heavier." The measure of a good traveler is how light he or she travels. You can't travel heavy, happy, and cheap. Pick two.Read the whole thing and see more tips on traveling light here, here, and here.
How do you fit a whole trip's worth of luggage into a small suitcase or backpack? The answer is simple: Bring very little.
Whether you're traveling for three weeks or three months, you pack exactly the same.
Entire books have been written on how to pack. Here are a few simple tricks. Pack for the best scenario -- not the worst.
The bulk of your luggage is clothing. Minimize by bringing less and washing more often. Every few nights you'll spend 10 minutes doing a little wash.
Go casual, simple, and very light. In your travels you'll meet two kinds of tourists -- those who pack light and those who wish they had. Say it once out loud: "PACK LIGHT!"
Also, some thoughts on how to have adventures on the cheap, something much easier to do when you travel light.
Andrew Ho has a round-up of carry-on travel packs.
(HT One Bag)