Secret to learning the difference between your "super-powers"and your "kryptonite."

Two words: self awareness.

Great article from HBR.org: How leaders become self-aware. Some excerpts.

The conviction (and yes, often ego) that leaders need for their vision makes them less than optimally wired for embracing vulnerabilities or leading with humility. 
Test and know yourself better. Take personality tests that facilitate self-reflection. Understanding what core traits drives your decisions and attitude is most important for increasing the probability for success
Watch yourself and learn. Warren Buffett, for example, has made it a habit for years to write down the reasons why he is making an investment decision and later look back to see what went right or wrong. 
Be aware of others, too. The best teams are rarely made up of similar types. On the contrary, they are composed of a diversity of excellence. 
The trinity of self-awareness: know thyself, improve thyself and complement thyself.
Easier said than done. Why? Because people don’t always commit to stand in the face of truth. Intellectual honesty, rigorous commitment and active truth-seeking are sine qua non to any self-awareness process.  
Self-reflection and its reward of self-awareness cannot be passive exercise. 
There is a reason why in rehabilitation programs the starting point is being aware enough to admit you have a problem. So, too, is the case in business leadership and personal development.