It seems to me, when it comes to solving physics problems, the strategy most people apply is to mindlessly plug numbers into equations without truly understanding the concepts behind it. To me this is a disgrace to the physics community! We learn physics to appreciate the beauty of nature not to pass some exams that confines our potential. Besides if you really want to be good a physics you need not only to know how to use the formula, you also need have insights to how it is derived and the concepts behind it. That is why I think it would be helpful for someone to start a sticky on formula derivation.