Only Pack Things That Can Be Worn More Than Once
Our rule: If you can't wear an item more than once on a trip, leave it behind. (Obviously, this doesn't apply to things like underwear and socks—unless you are also packing laundry detergent.) This means you shouldn't pack the really cute shoes that only match one outfit or the blazer that only goes with one shirt. Instead, pack things that can be mixed and matched and worn a few times on your trip. Try to keep most of your clothes within the same color palette so you don't have to worry about clashing.