Paracord - some 20ft of it - is incredibly useful, especially if you also have some knowledge of knots. It's always possible to rig a drying line, tie a window open, or even rustle up an emergency fix to a friend's broken guitar strap. Travel Items, Friends Broken, Bugs, Windows Open, Broken Guitar, Knots Ties, 50 Emergency, Emergency Bags, Guitar Straps
The Nuddle Blanket — "This is definitely a must-have travel item! I swear it’s the best blanket ever because you can tuck your feet into a pocket, slip your arms through open coverings, and fold it into a compact square when you need to pack up. I never leave home without mine."
No matter where you are in the world (except Middle East) you will find that a deluge hits you out of the blue. Then you will be glad you packed an emergency shell like this one from Patagonia. Weighing almost nothing and taking up very little space, it can be stuffed in your backpack or carry-on as needed. And it dries in an hour in your hotel room so it's ready for the next time.
How to pack a carry-on: I used this when loading my pack for my trip to Italy and it was great. Everything was balanced and protected.
Roll up paper mementos and keep them in a wide mouthed water bottle to prevent damage. >>> Nice travel tip!
If you have a US Passport and travel frequently then applying for Global Entry is a must. This program allows you to fast-track through US immigration and customs. And you don't have to fill out any forms on arrival, just check off some declaration options on the Global Entry terminal screen. I just wish there was also a way to speed up the arrival of checked bags :). Recommended.