Your phone's screen touches your face like a thousand times a day, so give it some love with portable screen wipes. It's way better for your gear than that paper napkin from the deli down the street, and there's no excuse not to carry a few around when they look this good.
Cord Organizers & Shorteners
Whether you need to keep your cords from taking over the inside of your bag or the tiny table at Starbucks, there's a product (or DIY!) out there to tackle it. Keep a short iPhone cable handy, or a "core" piece of gear that keeps loose wires under wraps.
A Spare Battery
If your tablet or phone battery is in the red by the end of your day, you need a backup battery. Keep a sleek battery pack always wraped around your phone, or stash an external powerstation into your messenger bag.