Aside from the typical must-haves when travelling (e.g. IDs, tickets, cash, cards, etc), my top 5 travel essentials are the following:
Mobile phone - for maps and other apps that will help me navigate and go around my destination
A book - so I won't get bored while in transit; I keep a Kindle app too, just in case I only have an electronic copy
Lipbalm and sunscreen/moisturizer - saying no to dark spots or dry lips/skin, this is a must-have even for men
Reusable cloth bag - for shopping convenience
In-earphones - for music when I want to relax during transits
My phone, with back up battery block charger.Water bottle.external sim card adapter so I don't have to worry about space on my phoneenough socks!comfortable shoes.
Mine would be:
Backpacking on the go!
Cell PhoneMelatonin (if you've never tried it, it's very helpful in adjusting to new time zones)Comfy pants to fly in Scarf & Mittens (we usually travel during low season so it tends to be cold where we go!)Electrical Adapter
iphone - camera, apps, books, music, videos!ipad - if im traveling with my son; it has all the apps, games for kidsuniversal adaptorbaby wipesscarf - multipurpose