What is graphic design?
"In a nutshell, graphic design is a creative problem-solving processes and that give meaningful visual form to content in all media: from print to screen.
Lou Danziger's offers these words of advice to art students—"Work. Think. Feel."—to elaborate: Work: "No matter how brilliant, talented, exceptional, and wonderful the student may be, without work there is nothing but potential and talk." Think: "Design is a problem-solving activity. Thinking is the application of intelligence to arrive at the appropriate solution to the problem." Feel: "Work without feeling, intuition, and spontaneity is devoid of humanity." (more)

What to know?
"Designers need to master a wide variety of skills and concepts. Designers think about visual forms and how they are put together to convey meaning. These forms are a kind of visual language. Points, lines, planes, volumes, spaces, areas, textures and colors, as well as how they are used to create symmetry, proportion and rhythm, are basic aspects of the designer’s visual vocabulary." (more)