Always start with a packing list.
and always end by reviewing your packing list.
Know your airline’s baggage fee policy.
Roll your clothes, not fold, it saves space.
Pick out what you think you need, and cut it in half.
Make use of packing cubes (or in a pinch, Ziplock bags).
Always pack your absolute essentials and one outfit change in your carry on.
Bring a few extra bags (e.g. totes, ziplocks, etc.).
Keep your liquids in a bag and separate them from your other goods.
Always wear your bulkiest items of clothing on the plane.
Forget full sized liquids, pack mini versions and buy if you need more.
Pack Wrinkle Wiz™ to remove wrinkles.