Be honest with yourself. You can't be the best you can be unless you know who you really are.
Don't make promises you can't keep
If you want to be the best you can be today, be honest with yourself about both your strengths and your not-so-strong points. Don't make promises to yourself or others based on the person you wish you were – promises you have no real chance of keeping. Own up to the person that you are and be the best version of that person you can be.