The next second thing to be remembered is

Follow your heart's thoughts but don't go into wrong fields since heart always turns towards bad things easily. Remember that your mind always cautions you when your heart is going in wring way so replace the heart with mind in above explanation and follow your mind

The very first thing to achieve success is to follow your mind

I think you may not understood clearly so i will explain it in little moment

The first thing you need to do is to allow your mind to always stay in free state of manner

Consider an example from your every life, when ever you are speaking to your close dearest persons you will speak comfortably this is the state of free (or) free state of manner

And if you are in a situation to answer to the question raised by a lecturer your state of manner will change from free state to an uncomfortable state(where you unintentionally stress your mind