There are things you know about yourself, things you do not yet know about yourself and things that other people know about you without your knowing. At your initiative, or because your company has proposed it, you can improve your efficiency, effectiveness and self-assurance by developing your knowledge of yourself. Sometimes, this is even a prerequisite for any action towards self-development Personality tests, interviews, self-assessment, 360-degree feedback etc. are all tools that give you better control of your professional life