
DO choose a bag with wheels
It’s easier for you, it’s easier for the baggage handlers, and it’s safer for your stuff. “If a bag has four wheels, we can push it down the length of the plane when we load it,” a former ramp agent and baggage handler told Reader’s Digest. “If it doesn’t roll, it most likely gets thrown.” That’s not because agents want to harm your bag, either—it’s simply the most efficient way to load the bags and get your flight out on time. These are the 13 things airlines won’t tell you.

DON’T choose a bag with flimsy attachments
Handles and wheels are the parts of your bag that are most likely to break, especially if you tend to pack heavy. “Every so often I’ll lift a bag off the belt and the handle will snap, or a wheel will break as it glances off the edge of the container door,” writes baggage handler Aaron Williams on the Globe and Mail. “I figure this happens once every 300 bags, and I think those are pretty good odds. Most of those bags have weighed well over 50 pounds.” The baggage handler who spoke to Reader’s Digest also suggests tucking in any straps, as those tend to get stuck in the conveyer belts your bag travels on throughout the airport.

DO choose a hard-sided suitcase
One of the first packing tips almost any air baggage handler will give you? Use a hard-sided bag. “I still check in suitcases,” one handler told Skyscanner. “I have a good solid suitcase with wheels. Such a suitcase normally doesn’t cause any problems loading it on a plane.”

DON’T expect a ‘fragile’ tag to do much
For the most part, bags with ‘fragile’ stickers aren’t handled any differently than bags without them, says the baggage handler who spoke to Reader’s Digest. “A lot of the times agents just don’t see the tags,” he says. “I would like to believe handlers pay attention to it. I did.” Williams is a bit tougher on bags with these stickers. “If everyone’s bag is fragile, nobody’s is,” he says. If you’re only packing a carry-on, bring the essentials, as well as these items that could save your life.

DO remove old tags
Out of all the packing tips, this one is easy to forget: The only tag that should be on your bag is one with your name and address on it. “If you have a bag tag from two years ago, as well as a load of other ones, it takes us infinitely longer to find the right date for where it’s supposed to be going,” one handler wrote on Reddit. (These are the 11 packing mistakes that could ruin your trip.) “This almost always happens because the tags are confusing and we only have an hour to sort 800 bags going to three places.”

DON’T leave a ton of empty space
File this under the packing tips to memorize: No matter what, your bag is going to get jostled around a bit. Prevent damage by packing it full, even if you have to use newspaper or bubble wrap to fill the extra space. If you buy souvenirs at your destination, you can always throw the stuffing out later.

DO lock the bag
“Locking your zippers together with a TSA lock will help keep it from opening up on its own,” says the baggage handler who spoke to Reader’s Digest. And when you over pack your bag, that happens more than you might think. Nervous about agents shuffling through your things? Don’t be, he says. “There’s this idea that the majority of people who work at the airport are thieves, and it’s obviously not true.”

Don’t set yourself up for disaster
“The most common cause of lost luggage is when people check in their bags at the very last minute,” says the handler who spoke to Skyscanner. “Another common occasion is when people transfer between flights.” And before you leave for your trip, these are the 16 airport mistakes to stop making before your next flight.