Want to know how often you're right? Use this free tool to track your predictions!

Check out one of our favorite online tools, PredictionBook, to track your predictions and understand the relationship between the outcome and your guess.

This free tool, made by our friends over at TrikeApps, determines what percentage of the time you're correct so you can learn over time to gauge how certain you should be. You can weigh in on the likelidhood of others' predictions too.

[PICTURE]