Be your best. Regardless of what you do, do it right the first time and every time. Whether you are taking out the trash or closing a multi-million dollar real estate deal, your best effort is required. When you give only your best to every endeavor you are showing yourself what you can accomplish.
If you want to better yourself, you should aim to always be humble. Avoid being arrogant because when you are arrogant, you are close-minded about anything new. Humility means that you are proud of your accomplishments, but you always give credit where it is due, and you always keep your mind open. Being open-minded is the key to improving yourself.