The Success Hangover.

In my last article, The Limits You're Still Obeying, I wrote about how experiences from difficult seasons can continue to influence us long after the circumstances have changed. We learn something from a setback, disappointment or difficult period, and without noticing, we can turn that lesson into a rule that follows us into the future. After writing it, I started thinking about the other side of that conversation. What about the lessons we learn from success?

I can think of times when I have walked into an important meeting or presentation less prepared than I should have been. Sometimes plans changed at the last minute and I had no choice but to improvise. The presentation went extremely well, people were engaged, the feedback was positive, and I walked away knowing I had handled the situation well. There is something useful to learn from an experience like that. I can think on my feet. I can adapt when circumstances change. I can trust myself when I don't have the luxury of preparing for everything.

There is also a completely different lesson I could take from exactly the same experience: I don't really need to prepare.

That is where success can become interesting.

A good outcome can teach us about our strengths, but it can also make us careless with them.

Imagine a negotiation that goes exceptionally well. You read the room correctly, make the right arguments and get the outcome you wanted. After a few experiences like that, it is easy to start thinking of yourself as a naturally good negotiator. There may even be plenty of evidence to support that conclusion.

The question is what happens next. Do you continue learning how to negotiate? Do you prepare for the next conversation with the same discipline? Do you study what made the negotiation successful, including the factors that had nothing to do with you? Or does being "a good negotiator" slowly become enough?

The same thing happens in careers. Some people spend years being approached for opportunities without actively looking for them. Their work is recognised. Someone recommends them. A new role comes along. Promotions happen without them having to initiate conversations about progression. There is nothing wrong with that. A strong reputation should create opportunities. It becomes a problem when we begin to assume that opportunities will always find us. We stop learning how to position ourselves. We don't build the muscle of asking for what we want. We may not even know how to articulate our value because, for a long time, other people have been doing it for us. Then the environment changes and suddenly we need capabilities we never thought we would need.

Leadership can create the same illusion.

You lead a team where people are capable, motivated and aligned. They communicate well. They take ownership. Performance is strong and, naturally, some of that success is attributed to your leadership. You may genuinely be a very good leader. But how much of what worked was you, and how much was the team you happened to be leading?

That question becomes much harder to answer until you find yourself leading a team with different dynamics, different levels of capability, competing priorities or unresolved conflict. A smooth leadership experience can tell us that we know how to lead. A difficult one can reveal how much more there is to learn.

This is what I have started thinking of as the success hangover.

Success gives us evidence that something worked. What it doesn't always give us is a complete explanation of why it worked.

Sometimes we were exceptionally good. Sometimes the conditions were favourable. Sometimes other people contributed far more to the outcome than we recognised at the time. Most often, success is probably a combination of our capability, preparation, relationships, timing, circumstances and the contribution of others.

The problem begins when we take the outcome and turn it into a permanent conclusion about ourselves.

We delivered one brilliant presentation, so we know how to present. We closed several important deals, so we know how to negotiate. We built one high-performing team, so we know how to lead teams. We have been promoted repeatedly, so we know how to navigate our careers.

Success gradually moves from something we achieved to something we assume about ourselves. Once that assumption becomes comfortable enough, the effort that helped us grow can start disappearing.

When Success Stops Making Us Curious

Failure is uncomfortable, but it has one advantage: it gives us a reason to investigate. When something goes badly, we want to know what happened. We seek advice, replay conversations, read, practise, prepare differently and pay closer attention the next time. Success rarely creates the same urgency. If the presentation went well, why revisit it? If the team is performing, why examine our leadership? If clients keep coming, why learn how to sell? If our decisions keep producing results, why challenge the way we make them? This is where leaders need to be particularly careful.

Growth can slow down long before performance does.

You can continue producing good results while your learning has already plateaued. Your experience, reputation and existing strengths can carry you for quite some time. From the outside, everything still looks successful, which makes it even easier not to notice that you have stopped stretching yourself. That is a very different kind of limitation from the one I wrote about in my previous article. Failure can make us afraid to test our limits. Success can make us forget that we have any.

You May Actually Be That Good

There is an important distinction here. The point is not to question every success until we have explained it away. You may genuinely be an excellent presenter. You may be a highly skilled negotiator. Your team may be performing well largely because you have led them well. The opportunities coming your way may be the result of years of excellent work and a reputation you have earned.

Own that.

Success is allowed to give us confidence. What it shouldn't give us is permission to stop developing. Being good at something today tells us something important about our current capability, but leadership rarely allows competence to remain static. The team changes, the stakes change, the environment changes and the complexity changes. What made us exceptional in one context may not be enough in the next. Even genuine strengths need to evolve.

The negotiation you can handle comfortably today may be very different from the one you will need to lead tomorrow. The team of ten you lead exceptionally well may not prepare you to lead an organisation of five hundred. The communication style that has served you well at one level of leadership may become inadequate when your stakeholders and responsibilities change.

That, for me, is the more useful way to think about success. Not with suspicion, and certainly not by diminishing what we have achieved, but by refusing to let achievement become the end of learning.

There is always another layer of the craft.

Success and curiosity do not have to compete. In fact, sustained success requires both.

After a setback, most of us naturally ask ourselves what we need to learn. I think our successes deserve the same examination.

What really contributed to this outcome? What did I do particularly well? What did other people or favourable circumstances make possible? What should I continue doing, and where am I relying too heavily on what has worked before?

Most importantly: What do I still need to learn even though I succeeded?

My last article ended by asking which limits we might still be obeying even though they no longer exist. This time, I am thinking about a different risk: the strengths, experiences, and successes we may have stopped questioning simply because they continue to work. Success deserves to be celebrated. Confidence earned through experience is valuable. Neither requires us to stop being students of our own leadership. Yesterday's success can tell us that we were good. It cannot tell us that we have become as good as we will ever need to be.

The success hangover begins when we confuse evidence that we are good with evidence that we no longer need to get better.