This is the first time that I feel an advice was tailor made for me. Frank Chimero's advice to a graphic design student in order of relevance to me:

Learn to write, and not school-style writing. A text editor is a perfectly viable design tool. Graphic design has just as much to do with words as it does with pictures, and a lot of my favorite designers come to design from the world of words instead of the world of pictures.

If you can’t draw as well as someone, or use the software as well, or if you do not have as much money to buy supplies, or if you do not have access to the tools they have, beat them by being more thoughtful. Thoughtfulness is free and burns on time and empathy.

Change contexts when you’re stuck. Draw wrong-handed and upside down and backwards. Find a good seat outside.

Keep two books on your nightstand at all times: one fiction, one non-fiction.

Rest of the advice is available here: http://blog.frankchimero.com/post/979706728/what-advice-would-you-give-to-a-graphic-design-student