Ethan Marcotte with some succinct, evergreen advice:
Set up a blog somewhere, anywhere, and write as much as you can. If I’m in a position to hire you, I don’t just want to see the quality of your final mockup, your finished set of templates: I want to learn how you got there. I want to read what worked, what didn’t, and the decisions you made along the way.
Ethan said in three-ish sentences what took me an entire column to say.