Seeking excellence does not mean becoming a perfectionist. A perfectionist accomplishes little because their efforts are never good enough to bring into the light of day. A perfectionist uses their dedication to perfection as an excuse for poor accomplishment. I'm not advocating that. I AM suggesting that you commit to constant and never-ending improvement to the service you provide, the products you make and the quality of your life.
Excellence is it's own reward.
My experience is that you get what you're willing to accept nothing more. As you up-level your tolerance for mediocrity, you'll find your life taking on a different dimension. Your enthusiasm, your zest and your confidence will grow. It will become contagious. It's a war you cannot lose.