Our readers, experienced globetrotters all, offered up dozens of suggestions in response. The most popular answer? “Overpack” (suggested by @CharlesMcCool, @molyneux_davis and @tourismpure on Twitter). Below are a few of our other favorites.
“Wear heels on a walking tour in Europe. The cobblestone streets will get them!” — Julianne K Fulcher
“Have full-size hairspray in their carry-on.” — Ron Buckles
“Travel to a foreign country … and forget their passport.” — Larry Shaine
“Bring the full-size pillow from their bed at home — I’ve seen adults do this so many times. On a road trip, okay, you’ve got extra space in the car, but on a flight???” — Jenny Szymanski Jones
“Don’t have customs forms filled out!” — @ChefStaib
“Bring a bag they can’t handle themselves (as a carry-on).” — Lavida Rei
“Wear multi-color neon running shoes with matching neon earrings AND leggings to walk down the Champs-Elysees.” — @Carellirec
“[Bring] more than a pair of heels, too much cosmetics to put in one handbag — new travelmate blues…” — @derahma
“[Wear a] camera around the neck; [spend] too much time looking at maps; guidebook in hand, ask me for help while I’m also ‘away’ & happy to help!!” — @CollCostello
“Follow the ‘rules’ too closely. Take some risks and if someone tells you ‘oh no we do not do that here’ you’ve learned something about a new place!” — Clare Olivares
What would you say is a sure sign someone is a newbie traveler?
— written by Sarah Schlichter