Here‘s a great interview with Debbie Millman. It’s part of the “Success Secrets of the Graphic Designer Superstar” series. 

Among other things, Debbie advises graphic designers to:

…constantly try to find out and learn about the things that you don’t know.

It’s really easy to learn about things that you know. And it’s pretty easy to learn about things that you know that you don’t know. I would suggest that people learn about all the things that they don’t know that they don’t know.