Ask yourself these four questions before you sit back and ride on the wave of your current accomplishments. If you can’t answer every one of these questions with a "no", there’s still more you can do.

• CAN I DO BETTER?

One thing you should consider when you’ve attained success is whether or not you and your organization gave the best you could. Nine times out of 10, you’ll realize that there’s one thing or another that you could have done differently that would have resulted in even greater success. If you spot something you can do better, you already have a way to improve your next step.

• IS THERE MORE I CAN LEARN?

Former UCLA basketball coach John Wooden asked this question constantly. For instance, after he had already won a national championship – something most college coaches never achieve – he scrapped the entire offense he’d used for years and learned a completely new one to maximize the talents of one player, Lewis Alcindor, no known as Kareem Abdul-Jabbar. His familiar words still ring true: "It’s what you learn after you know it all that counts."

• DO I STILL HAVE UNUSED RESOURCES?

Your people are your single greatest resource. Have you developed them to their full potential? What separates successful people from those who redefine their field is the ability to maximize the potential of their people. Even if you have a superstar on your team, your team won’t be successful as it can be until the other team members excel in their own right.

• HAVE OTHERS GONE FURTHER?

The precedent for success continually changes. The bar is continually raised, regardless of your field of endeavor. If you think you’ve arrived, you’ve missed the point. The journey is as important as the destination.

Abraham Lincoln said, "Good things may come to those who wait, but only the things left by those who hustle." When a goal is reached, celebrate your success, but don’t wallow in it. Remember the words of Charles Handy: "It is one of the paradoxes of success that the things and ways which got you there are seldom those things that keep you there." Determine how you and your organization can improve and begin taking the necessary steps to raise the bar one more notch.

John C. Maxwell is the found of INJOY, an organization dedicated to helping people maximize their personal and leadership potential. Maxwell has authored numerous books, including The Success Journey, Developing the Leader Within You, Developing the Leaders Around You, The Winning Attitude, and his new book, of which this article is an excerpt, The 21 Irrefutable Laws of Leadership.