Writing a thank you note forces you to confront the humbling fact that you have not achieved your success alone. You had help along the way. More important, it forces you to identify your strengths and weaknesses. After all, when you thank people for helping you, you’re admitting that you needed help in the first place—which is one way to pinpoint your deficiencies. If you didn’t need to improve in a specific area, you wouldn’t have needed another person’s help.
