How to become a great graphic designer?

1. Read books.
2. Maintain web standards.
3. Keep yourself abreast with the latest happenings.
4. Share your works with others on. You can use free platforms for designers.
5. Get experience.
6. Cooperate with your clients.
   

By learning & applying. Learn on a daily basis & apply to do practical, whatever you are learning. This way you can be a good graphics designer.