What you think.

You may believe that you are responsible for what you do, but not for what you think. The truth is that you are responsible for what you think, because it is only at this level that you can exercise choice. What you do comes from what you think.— Quote from A Course in Miracles

Write the script of your own life, rehearse it in your mind, then go out and perform it to the best of your ability. Our minds can shape the way something will become because we act according to our expectations. Start now, make today great!