Hints to guide your choices:
1. Buy fabrics in wool or silk. These natural fibres have some elasticity, which keeps them from crinkling.

2. Buy synthetic fabrics or clothes that contain blends of synthetic and natural fibres. These fibres make clothing less wrinkle-prone, more durable and easier to care for.

3. Opt for linen, which creases easily but "falls out" nicely and carries off the crumpled-casual look well.

4. Choose knits instead of weaves. Knitwear -- which includes cable, ribbed, tricot and jersey knits -- wrinkles less than woven fabrics.

5. Pack intelligently. Make use of flat suitcase pockets and special packing accessories that hold clothes in place, and don't overstuff your bags.

6. Consider rolling knits, denims and linens to avoid harsh fold lines.

7. Unpack your bags upon arrival.

Note:

Non-clothing essentials:

I like to pack small items in their own pouches, to make it easier to find things at my destination. My pouches will usually hold the following: Dental stuff; hair stuff; First-aid; Small electricals (including walkie-talkies we always take so we can find each other at outdoor markets, and batteries); on-board travel necessities (ear-plugs, eye-shades, AirBourne, No Jet Lag, inflatable neck pillow, drinking water, water spritzer, gum or lozenges). Remember not to carry-on your favourite nail scissors, as you will still lose them to security at the departure gate. You are permitted to bring a cardboard emery board, if you must repair a chipped nail en route.

Among handy items to pack, you'll find that Ziploc bags are very useful -- good for wet items, medication, shampoo bottles, soap and dirty laundry. Stowing some of your personal belongings in clear, plastic bags also reduces the chance that airport screeners will have to handle them. Consider wrapping a couple feet of duct tape around a pen or marker. This works great to fix broken sandal straps, luggage handles or for any other unexpected repairs. Avoid camera calamities and pack extra batteries in addition to extra film. Pick up some wet wipes for washing your face, wiping hands, and cleaning sand or dirt off of personal belongings. If you have a device that seals the edge of plastic pouches, charge several with a one-load quantity of liquid laundry soap. None of these items will add much weight or take up a lot of space in your baggage.

Some other items every traveller should carry: Photocopies of your credit cards and passport (carry copies separately from your cards), photocopies of prescriptions for necessary medicines or eyeglasses, Imodium (for diarrhea), a pocket flashlight, and your address book. I also like to take blank labels so I can use those ubiquitous free-postcards available more and more widely.

Security check-point tips:
While waiting in the airport security line, pack a small zippered bag with your watch, jewellery, keys, change, cell phone, and belt. This will keep your valuables together and enable you to reassemble in peace -- not in public. Have your boarding pass and driver's license ready for security personnel. Wear metal-free shoes. Label any larger, important valuables with your name, phone number and email address.

Food on the Fly:
Since many airlines stopped serving meals on domestic flights and decided a turkey sandwich was worth EIGHT BUCKS, packing food for plane or car trips has become essential. Carbs, particularly refined ones, such as sugar or white flour, give you quick energy and then a crash, so you crave more. Start with a good breakfast and carry snacks, such as nuts, dried fruit, and cheese cubes. The fruit gives you a quick energy boost and the nuts provide protein to sustain you.

Leave Jet-lag behind:
Jet lag happens when the body's inner clock falls out of sync with daily cycles of light, meals and rest. Minimize the effects by getting several nights of good sleep before your trip. During the flight, do isometric exercises, eat light meals, and keep hydrated, but avoid sugary, alcoholic or caffeinated drinks. If you have crossed several time zones, you may want to consider a taking a supplement that eases transitions to new time zones. One homeopathic supplement that does just this is called "No-Jet-Lag" as well as in many homeopathic and herbal remedy stores.