It is important as a mentalist to notice small things about people. . . little things such as being able to tell if someone is right or left handed by looking at which way their belt is pointing. Looking at a book of matches will tell you if they are right or left handed by the side the matches are removed. . . . It's important to notice these things because the more you do, the more you will realize that each person has little psychological nuances that tell you a lot about the individual. Doing so will tremendously sharpen your skills.