Reflect on how your childhood or early development may be contributing to your current approval-seeking behavior. In many cases, a tendency to seek approval at work stems from something in your past. 

For example, were you taught to respect authority growing up? If so, you may feel uncomfortable expressing disagreement in work contexts.

See disapproval as a form of feedback, as information you can use to improve and make your next performance even stronger. It also helps to also re-frame rejection as something positive. 

It means you’re moving forward and pushing limits, rather than just staying in your comfort zone.

By understanding that there is abundant room for growth, improvement, and success, you free yourself from needing approval from others.

If you usually seek approval, focus on improving processes, rather than achieving a particular outcome.

When you focus your energy on one singular result (getting a promotion or raise for example) you attach your self-worth to external standards—which may be outside of your control.