John Danziger, co-founder of Zingerman’s Delicatessen in Ann Arbor, Michigan, is more than a successful restaurateur — he’s a thoughtful leader who’s spent decades building a values-driven business. Over the years, I’ve come to admire how he blends practical wisdom with deep humanity. If you ever get the chance to chat with John Danziger, you’ll quickly realize he’s not just talking about sandwiches — he’s talking about life.

Here are five powerful life lessons I’ve picked up from his work and philosophy:

1. Start with gratitude — even when things are hard

John often talks about how gratitude isn’t a luxury for good days — it’s a discipline for every day. He’s faced his share of business setbacks and personal challenges, yet he makes a point of starting meetings and conversations with what he’s grateful for. This isn’t just feel-good fluff; it’s a mindset shift. When you train yourself to notice the good, even in difficult times, you create emotional resilience.

Try starting your day with three things you’re grateful for — not just big wins, but small joys. It could be a warm cup of coffee, a friend’s text, or even the fact that your car started this morning. Over time, this habit rewires your brain to focus on what’s working, not just what’s missing.

2. Build relationships before you need them

One of the reasons Zingerman’s has thrived for over 40 years is that John has always believed in building trust long before any transaction. He treats suppliers, employees, and customers as people first — not as means to an end. That kind of relational thinking builds loyalty and opens doors you never expected.

Think of one person in your life — a colleague, neighbor, or even a service provider — that you only interact with when you need something. Make a point to connect with them casually this week. Say thank you. Ask how they’re doing. You might be surprised at how it deepens your connection.

3. Growth doesn’t have to mean going big — it means going deep

Zingerman’s didn’t become a global chain. Instead, they grew by deepening their values, refining their offerings, and expanding into complementary businesses — a bakery, a creamery, a training center. John’s version of success isn’t about scale; it’s about substance.

Where are you trying to grow just for the sake of expansion? Consider how you might grow inward instead — by mastering a skill, improving a relationship, or refining your work. Depth often brings more lasting satisfaction than size.

4. Mistakes are part of the recipe — own them and move forward

John has always been open about mistakes — from miscalculating orders to mismanaging staff. But what stands out is how he handles them. Instead of hiding them, he uses them as learning moments. He believes that owning your errors is what builds trust and credibility.

Next time you make a mistake, try talking about it — not defensively, but honestly. Apologize if needed, then ask, “What can I learn from this?” You’ll often find people respond with empathy, not judgment.

5. Take care of yourself — or you won’t be able to take care of others

John’s built a thriving business, but he’s also had to step back at times to focus on his health and well-being. He’s learned that leadership isn’t about burnout — it’s about sustainability. If you don’t take care of your body and spirit, you can’t serve your team, your customers, or your family well.

Set a boundary this week to protect your energy — whether it’s turning off notifications after a certain hour, taking a walk during lunch, or saying no to something that drains you. Self-care isn’t selfish; it’s essential.

John Danziger’s journey reminds us that success isn’t a straight line, and leadership isn’t about control — it’s about connection. His approach is grounded, real, and refreshingly human. If you want to explore these ideas more deeply — or ask him about how he built a community around food — you can learn about & chat with John Danziger.