There are a lot of self-assessments out there that can help us learn more about ourselves. Below are some that might be interesting to you, and which might help you become a better leader and more successful student.
The big five personality traits are the best accepted and most commonly used model of personality in academic psychology. The traits are extraversion, neuroticism, agreeableness, conscientiousness and openness to experience.
This test will result in a personality type that includes your tendency towards
Extraverted (E) vs. Introverted (I),
Sensing (S) vs. Intuition (N),
Thinking (T) vs. Feeling (F),
Judging (J) vs. Perceiving (P).
This test costs $50, but you can also try finding an imitation online, such as this one: http://www.humanmetrics.com/cgi-win/jtypes2.asp
Determine if you are a Prioritizer, Planner, Arranger, or Visualizer. It may be helpful to build teams with people of several different types. Results will also list tools and applications that maybe be helpful to your productivity style. From Harvard Business Review.