These lists will help you to focus and rehearse. Another way to prepare is to have a friend help you stage a mock interview. This is especially useful if the friend has experience giving or being interviewed. Take these rehearsals seriously, and ask your friend to be constructively critical. If you don't have time for this, try it alone in front of a mirror.
Generalities hold little to no weight.
The first pitfall is the format and language of the question. Because they were asked for two. They allow the format of the question to dictate their answer. However, by framing your answer around the concept instead of the actual question, you'll multiply your alternatives and impress your interviewer. The second pitfall happens when you don't listen to the question.