In his book, That First Season, John Eisenberg tells the following story of Vince Lombardi:
Obsessing over a new offensive wrinkle one day, he forgot to put on his pants after practice and left the locker room wearing just his underwear; a security guard told him to go back and finish dressing.
It was his extraordinary focus that helped make Vince Lombardi a great football coach. He knew what mattered to him and pursued it with abandon. He also knew what should be secondary to his pursuit and didn’t allow those things to distract him.