You have to be uncompromised in your level of commitment to whatever you are doing, or it can disappear as fast as it appeared... Excellence isn't a one-week or one-year ideal. It's a constant. There will be days when you don't feel on top of your game, or meetings in which you aren't at your best, but your commitment remains constant. No compromises.
I have missed more than 9000 shots in my career. I have lost almost 300 games. On 26 occassions I have been entrusted to take the game winning shot... and missed. And I have failed over and over and over again in my life. And that is why... I succeed.