Body language covers everything from your facial expressions and body posture to your eye movements and handshake. It’s something you probably never think about, yet it has the power to affect whether you get ahead or lag behind in your career. This may sound dramatic, but think about how you perceive your colleagues and what this perception is based upon. Now imagine that you’re hiring a new employee, deciding who to promote to a leadership role, or determining who should look after an important client.