Laptop Productivity On-the-go

From Lifehacker:

You're an on-the-go worker, and the one thing you always carry with you? Your trusty laptop, of course. Sure, you've reached a point where you're pretty good at getting things done away from your desk, but you still haven't reached laptop zen—that point at which your laptop does gymnastics for you and is a seamless extension of your productivity. Today we're taking a look at some of the best laptop hacks for notebook enthusiasts, from getting internet access anywhere and keeping your files in sync to adding an anti-theft layer of security to your laptop.