The 7 Habits of Highly Effective People by Stephen R. Covey21%
Awaken the Giant Within by Tony Robbins36%
Nonviolent Communication: A Language of Life by Marshall Rosenberg11%
The Alchemist by Paulo Coelho10%
Another Book (I will mention it in comments)19%
Online course30%
In-person course50%
Mentorship65%
Reading52%
Trial and error45%
Feedback from direct reports41%
Other (please specify in the comments)1%
Yes48%
Only certain courses42%
No7%
Other (explain in the comments)1%