I get a lot of critical feedback from my boss and I don't always know what to do with it or how to improve. Sometimes I don't even agree with the feedback. What should I do when I don't think the feedback is correct?

The topic of 'feedback' is a passionate one with many people. For me, feedback is fuel, but at the same time it needs to be actionable and agreed upon for it to be that 'fuel' for change/innovation. My advice for if you don't understand, or agree with, the feedback you're receiving would be to start with checking your understanding with the individual providing the feedback. Just like in a customer/prospect discovery call, you can start off by summarizing your understanding of the feedback. This will give you the opportunity to validate your understanding of what you have heard and it will prove helpful to ensure you are both on the same page. Also, don't be afraid to be honest - tell your boss that you are committed to improving, but you want to be sure you know what to focus on, and you need to better understand what is being asked of you. This will allow you both to agree on the steps required to set up a course of action. Finally, if you are confused with the feedback, or not in agreement with what has been presented back to you, ask for clarification through specific examples. In my experience this helps to unpack the feedback and clarify what you've heard.

Listen to the feedback that your boss might give you - even if you don't agree. Take a deep breath or go for a run. Don't push back on the feedback, move forward to improve it and document where you're getting better for visibility into an issue that might have happened in the past. It's also important to have a mini "board of directors" that aren't at your organization that you can call up and vent to. Without knowing the inner workings of your company, direct reports, or boss - they can provide helpful directional feedback that they've seen in the past.