Experienced travelers share their 'Why didn't I think of that?' packing essentials

A Sharpie with duct tape wrapped around it—yes, really

It sounds strange, I know, but Sharpies are always good to have on hand and so is duct tape. (Fixing a broken strap in a pinch, mending an unexpected tear in a bag, using a tiny bit to keep a chip bag closed, stopping the vent from rattling in the hotel room—so many uses.) No one wants to pack an entire roll of duct tape, though, so wrapping a length of it around the Sharpie gives you a usable amount without taking up any precious packing space.

A Ziploc bag full of Ziploc bags and rubber bands

My family recently traveled to Europe, and on our way out the door, I grabbed a handful of Ziplocs and rubber bands, just in case. I've traveled enough to know I always want a Ziploc for something, and the rubber bands were just a whim because they were within eyesight and they weigh almost nothing.

We ended up using every single Ziploc and rubber band I grabbed during our travels. They're useful for so many things. Opened a packet of nuts or chips and want to save what's left? Ziploc or rubber band. Favorite beaded necklace broke and you need a place to keep the beads together so you can fix it when you get home? Ziploc. Your travel lotion lid suddenly leaks after never leaking before? Ziploc. Want to keep track of whose glass is whose in the place your rented? Rubber bands. Bought a fragile souvenir? Wrap it up in a piece of clothing and put a rubber band around it. So many uses.

Universal adapters and extra long charging cables or an extension cord for devices

Along with a universal adapter (a must if traveling internationally—take two in case you lose one), it's a good idea to pack an extra-long charging cord for your devices in case electrical outlets are located in inconvenient places. An extension cord works too, but takes up a bit more space and weight in your luggage.

A waterproof bag (aka dry bag) that can be used for multiple purposes

Not only does a waterproof dry bag handy keeping your stuff protected during water adventures, but it's also how you can keep the wet swimsuit you inevitably end up with from touching the rest of your luggage. It can do double duty as a laundry bag and you can even use it as a makeshift washing machine for a few small items you want to wash—just toss in part of a laundry detergent sheet, some water and your clothes, and shake. (These come in a variety of sizes, so decide which size you'll need.)

Laundry detergent sheets

At some point in your travels, someone in your party is going to need to wash something, and it's super helpful to have your own detergent on hand. These laundry detergent sheets look like paper, take up practically no room and weight almost nothing, plus no liquid messes to worry about. Just toss a few into a Ziploc bag and you're good to go.

A clothesline—but not just any clothesline

Theoretically, you could use any kind of string or cord for a clothesline, but these braided ones are ideal for travel for a few reasons. One, the suction cups make it easy to use in a shower. Two, the clips make it easy to use wrapped around poles or trees. Three, the braided cords eliminate the need for clothes pins because you can just tuck a bit of fabric in between the cords to hang things.

A small container of over-the-counter medications and electrolyte/hydration packets

Even if you're not someone who usually takes pain reliever or needs extra hydration, traveling can do weird things to your body, especially when you're visiting another country where everything is unfamiliar. Plus, a lot of over-the-counter medications we're used to may not be easy to find elsewhere, and you definitely don't want to be trying to figure out how to find antidiarrheal medicine when you desperately need it. As for electrolytes, people swear by powdered hydration packets like Liquid I.V. for getting over jet lag quicker, but they're also good to carry especially in places that are hotter than you're used to, where it's easy to get dehydrated.

Thin, compact, reusable grocery sacks

Specifically, ones like these BeeGreen sacks that fold down super tiny, taking up almost no packing space, come in super handy for shopping, laundry, beach, souvenirs and more.

Leave the extra sweater at home

What do people regret bringing? Too many clothes, across the board.

Sometimes it's a matter of being overly prepared, thinking you might need a sweater while you're in Indonesia, only to be met with the reality that it's always a million degrees and a thousand percent humidity there. Sometimes it's a matter of thinking you need more shoes than you do or that it will be harder to wash things than it is. Sometimes it's realizing that you want to buy the cheap, beautiful clothing you find at your destination but don't have room in your luggage to bring them home.

But pretty much everyone who said they regretting bringing anything said clothes. So pack light on the clothing, heed the "must haves" above, and you'll be golden wherever you end up traveling.