THE SINKLEAVE IT BETTER

A philosophy for everyday leadership

Leave it
better.

What if the most meaningful kind of leadership begins with one simple decision: wherever you go, leave something better than you found it?

Discover the philosophy
A well-dressed traveler intentionally wiping down an airport sink
“You know, it’s not a bad idea to leave things a little better than you find them.”
Leave self betterLeave others betterLeave world better
01

The moment that started it all

A stranger. An airport sink. A sentence that changed everything.

I was washing my hands in an airport restroom when I noticed a man in a very nice suit beside me. After drying his hands, he took more paper towels and carefully began wiping down the sink.

It looked so unexpected that I joked, “Have you been working here long?” He smiled and offered a simple reply: “You know, it’s not a bad idea to leave things a little better than you find them.”

He walked out. I wiped down my first public sink—and a philosophy of personal responsibility was born.

The S.I.N.K. philosophy

Four movements. One way of life.

Leaving it better is not a grand gesture. It is a repeatable way of seeing a need, owning your part, and taking the next right action.

S

Seek the need

Notice what could be better. Pay attention to the person, place, or moment in front of you.

I

Invest yourself

Bring what you have—your attention, energy, skill, kindness, or time.

N

Nullify the need

Take responsibility and act. Do what you can to genuinely improve the situation.

K

Keep it going

Make goodness contagious. Invite others to carry the practice forward.

Make it real today

Three directions. Eighteen ways to begin.

Choose a direction below. You do not have to change everything today—just leave one thing better.

Begin within

Leave self better today.

You cannot give the world what you are unwilling to cultivate in yourself. Choose one small investment in the person you are becoming.

  1. 01

    Begin the day with ten quiet minutes to reflect, pray, or set your intention.

  2. 02

    Move your body in a way that leaves you stronger and more energized.

  3. 03

    Read or listen to something that enlarges your thinking.

  4. 04

    Finish one task you have been avoiding.

  5. 05

    Replace one harsh thought about yourself with something true and constructive.

  6. 06

    End the day by naming one lesson learned and one thing you are grateful for.

Everything may not be within your control.

But something is always within your reach.

Choose your one thing today →

Read it. Share it. Live it.

The books that carry the idea forward.

The Sink: Leave It Better book cover

The original

The Sink: Leave It Better

The short, beautifully illustrated story that invites people of every age to live with greater ownership and intention.

Buy on Amazon →
The Sink for Kids: Leave It Better book cover

Ages 6–12

The Sink for Kids

A child’s first leadership book—helping young people notice needs, take responsibility, and make a positive difference.

Buy on Amazon →

The authors

Two friends. One simple idea worth sharing.

Walter Nusbaum and Dr. Daren Martin created The Sink to turn one unexpected airport encounter into an invitation: take responsibility for what is within reach, and leave it better.

Author · Speaker · Executive Coach

Walter Nusbaum

Walter Nusbaum is a nationally recognized keynote speaker, author, and executive coach who has spent more than 20 years helping leaders and organizations pursue excellence. As president of The Nusbaum Group, he works with executives and teams across industries to strengthen leadership, communication, accountability, and culture. Walter is known for turning meaningful ideas into memorable language and practical action. The Sink began with his chance encounter in an airport restroom—and reflects his conviction that leadership is less about position than taking responsibility for what is right in front of us.

Visit Walter’s website

Culture Architect · Bestselling Author

Dr. Daren Martin

Dr. Daren Martin is a Wall Street Journal and USA Today bestselling author, global keynote speaker, and trusted advisor known as “The Culture Architect.” With a Ph.D. in psychology and decades of entrepreneurial and consulting experience, he has helped organizations—from small businesses to Fortune 500 companies—build stronger leaders, healthier cultures, and greater ownership at every level. His books, including A Company of Owners, translate big ideas into energetic, useful practices. In The Sink, Daren brings that same belief in ownership to the smallest choices of everyday life.

Visit Daren’s website

Bring the philosophy with you

Resources for homes, teams, schools, and organizations.

01

Books & bulk orders

Share the message with your family, classroom, team, or event.

02

Discussion resources

Turn the story into meaningful conversations and daily practice.

03

Speaking & workshops

Bring Leave It Better to life for your organization.

Ask about books & resources →

Let’s leave something better together

Start a conversation.

Have a question about the books, a bulk order, a school or organizational program, speaking, or a possible partnership? Contact Walter or Daren directly.

Email Walterwalter@thenusbaumgroup.comEmail Darendaren@darenmartin.com