Overworking yourself is never a way to achieving success and even if it does brings it, you won't stay long to enjoy the success.

Many a times we think doing above the limits of the extra hours is the breakthrough path, but sorry to break your heart it isn't.

Learn to rest your head through good sleep (at least 6 hours). Eat healthy; irrespective of what the task is, if you fail to eat your body will fail to execute it, and when your body doesn't execute it then your boss/clients looses trust in you and hires another who has fuelled his body by feeding it with good food at the proper hours.

On the image above are the other ultimate habits for success.

Study and implement them...