What should a new manager do in the first 30 days?

In the first 30 days, focus on listening and relationship-building before making any changes. Have 1-on-1s with each team member to understand their context, what they care about, and what they need from a manager. Resist the urge to implement improvements immediately. The relationships you build in this phase determine how every later decision and intervention lands.

What are the biggest mistakes new managers make?

The most common mistakes are: staying too close to the technical work instead of shifting to leadership, trying to be liked before being trusted, skipping 1-on-1s when things get busy, and waiting too long to have difficult conversations. Each of these gets harder to correct the longer it continues.

How does a new manager build credibility quickly?

Credibility comes from consistency, honesty, and follow-through, not from having all the answers. Say what you'll do, then do it. Have direct conversations early rather than letting problems fester. Show your team you are invested in their growth, not just their output.

When should a new manager start giving feedback?

Start within the first month. Delaying feedback signals that the behaviour you are seeing is acceptable. Addressing things early, kindly and clearly, is one of the most powerful things a new manager can do to establish credibility and a healthy team culture.

How can a new manager build a leadership development habit?

Start a weekly reflection practice in your first month, before the pace of work makes it hard to create one. Fifteen minutes each week to review what went well, what was hard, and what you want to do differently. Over 90 days, this builds a real picture of your growth as a leader.

The New Manager's First 90 Days: A Practical Survival Guide