Check out the cognitive dissonance song/cartoon if you've had any trouble with the concept.
Also, the cognitive bias song will help you sort out all the various biases (availability, hindsight etc.)
Please get a good nights sleep, eat well in the morning (no refined sugars or heavy starches). I suggest you bring a bottle of water, a small healthy snack (almonds, pecans, cheese stick etc.), sharpened pencils and your flow!
