Someone might be reading these posts as a joke...but seriously if you're pretty decent at video games, the cog portion is cake. I know Gears of War definitely helped me through

The tests themselves are VERY simple...the hardest part is forcing yourself to pay close attention for an hour straight. Also, the random recall part is quite a curve ball. At some point in the test, you will have to remember a pattern of numbers, then later in the test it will ask you to recite that pattern again.