You can learn great things from your mistakes when you aren't busy denying them. Read The 7 Habits of Highly Effective People.

Whatever you fill your brain with and whoever you spend your time with... will determine your life a decade from now.

Successful people willingly do what unsuccessful people are unwilling to do.

What you do today determines who you will be tomorrow.

If a person wants to be a part of your life, they will make an obvious effort to do so. Think twice before reserving a space in your heart for people who do not make an effort to stay.

You will never become who you want to be if you keep blaming everyone else for who you are now.

Sometimes you need to distance yourself to see things clearly.