Excellence is not a skill. It is an attitude.
What you do today can improve all your tomorrows.
Don't lower your expectations to meet your performance. Raise your level of performance to meet your expectations. Expect the best of yourself, and then do what is necessary to make it a reality.
There is a thought in your mind right now. The longer you hold on to it, the more you dwell upon it, the more life you give to that thought. Give it enough life, and it will become real. So make sure the thought is indeed a great one.
The value of an ambitious goal is not measured by what it will bring to you. The worth of a goal is measured by what it will make of you in the process of following and attaining it.
Sure, it's easy to be upbeat when everything is going your way. Anyone can do that. It is far more important, however, to take a positive approach in circumstances that most people would view as negative.
The real person you are is revealed in the moments when you're certain no other person is watching. When no one is watching, you are driven by what you expect of yourself.