How to take a screenshot on your Surface
Method 1: Press and hold the Windows button, and press down on the lower volume button on the side of your Surface. Your screen will dim a little for a moment when you do this. (this saves to \Pictures\Screenshots)
Method 2: Double-press the pen top button. (this will import it directly to OneNote)
Method 3: On the keyboard, press Fn + Win + SpaceBar. (this also saves to \Pictures\Screenshots)
Method 4: Swipe left to open Charms -> Share. Click the tiny down arrow and tap "Screenshot". (this will further prompt you where you want to share it to, i.e. mail, paint, facebook, etc..)