Updated Sat, May 01, 2010 by Cyrak
In Starcraft II information wins games plain and simple. Knowing what your enemy is building, or where he is expanding while concealing your own tech lines and expansions from him is the most valuable possible skill you can possess in this game. Learn to love Scanner Sweep, Overlords, and Observers. Take control of the vision nodes located on maps, frequently send expendable scouts to look at potential expansion spots and to test your opponent's defenses. Most importantly of all: attempt to know the location and composition of your opponent's armies at all times. Failure to do these things is the most common and most deadly newbie mistake.