Photo: Courtesy of LeSportsac
The right size: An overnighter roomy enough to hold an extra outfit, pajamas, toiletries and a pair of shoes. (Most airlines limit your carry-on to 45 linear inches—meaning your bag should be no bigger than 22" x 14" x 9").
The most common mistake: Buying a bag that's heavy when empty. Thick leathers stand up to being stuffed into the overhead compartment, but they add extra weight.
One to try: A striped style is easier to spot on the luggage carousel, and everyone from Tory Burch to Donna Karan sent stripes down their spring runways.
Next: Packing secrets from travel pros