The First 90 Days as a New Manager (What Actually Matters)

The pressure to prove yourself in your first 90 days as a manager is real. Don’t let pressure push you in the wrong direction.

You’ll feel like you need to:

• have all the answers
• make quick changes
• prove you deserved the role
• show immediate impact or authority

This pressure makes you want to move faster than you should, or fix things immediately because you want to prove yourself quickly.

So here is the challenge:

You can move quickly… and still get it completely wrong because you’ll end up finding yourself struggling in ways you didn’t anticipate or creating unintended friction. The struggles often come from being unprepared for the actual job. Not the title or the responsibilities on paper.

The real job:

• managing people’s emotions
• navigating expectations from all sides
• balancing business outcomes with human needs
• figuring it out while still doing your own work

It can feel overwhelming quickly… and it’s because it is overwhelming, and slowing down can help. Instead of trying to prove yourself in your first 90 days, focus on building your foundation. Here is what to do instead:

1. Put your oxygen mask on first

Before you try to take care of everyone else, make sure you’re actually set up to do the job.

Get clear on:

• what you’re responsible for (and what you’re not)
• how you’ll be measured
• what success actually looks like (what is the vision in your manager’s eyes?)
• what support you have (or don’t have yet)

Most managers skip this step — and they feel it later in frustration, resentment, and burnout.

2. Know your people (don’t guess, ask)

You cannot lead people you don’t understand. Set up your 1:1s early and use them to learn:

• how they like to communicate
• what motivates them
• what their career goals are
• how they like to be recognized
• what stresses them out

This is where trust actually starts — seeing the people on your team and leading them from a place of understanding.

3. Learn your team’s history

You’re not starting from scratch, even if it feels like it.

Your team already has:

• patterns
• frustrations
• ways of working
• things that worked (and didn’t)

If you ignore that, you will repeat what already failed. You can also understand what projects they’re proud of or feel strong ownership over, so you don’t accidentally create frustration by throwing something out that the team feels deeply invested in.

4. Understand your boss (yes, really)

This one matters more than people admit, because your success is directly tied to how well you align with them.

• How do they communicate?
• What do they prioritize?
• What does “good” look like to them?

And just as importantly: you need to share your preferences too. If they meet you halfway, great. If they don’t, you’re prepared and understand that managing up becomes part of your job.

5. Plan for burnout now (not later)

Not if. When.

The role will stretch you. So before you hit the wall, know:

• your boundaries
• your warning signs
• your support systems
• your options (company policies like PTO, leave of absence, mental health resources, etc.)

Waiting until you’re overwhelmed is too late.

Here’s the shift most people miss:

Your team isn’t waiting for you to come in and fix everything (they’re actually probably scared that you will do that).

They’re watching:

• Do you listen?
• Do you understand what’s actually happening?
• Do you create clarity?
• Do you show up consistently?
• Can they trust you?
• Can they respect you?

The first 90 days aren’t about proving how capable you are. They’re about showing how intentional you are.

If you’re stepping into management or already in it and feeling the weight of it, you need to ensure you’re building yourself a solid foundation.

Inside Laying Your Own Management Foundation, I walk through how to:

• get clear on your role
• set your intention and guardrails
• build strong, effective relationships
• manage the emotional and practical realities of the job

Think of it less like “training.” It’s truly more like a guided conversation at your own pace to help you actually figure this out.