Luggage is a fairly universal need when you're traveling, and having a wide selection to choose from makes it easy to find the right suitcase or bag to carry your things. The types of luggage you check at the airport and the kinds you carry onto planes when boarding are different. Kids' luggage and packs are also designed with styles to please younger tastes than what you find with adult luggage sets. Here's how to determine the type and accessories you need to get prepared for your next excursion.