Interview Questions:

Five Interview Mistakes

Graphic Design Interview Questions (Article with questions and example answers)

Freelance:

Transitioning From Graphic Designer to Business Owner (Design Cuts)

How to Pave Your Own Path As a Freelancer (Graphic Arts Today Magazine)

How Much Should I Charge for Graphic Design Work? (Creative Market)

How Much Do Graphic Designers Make? (Rasmussen College Article)

Developing your Business:

The Art of the Pitch (Pitching yourself / business)

Amy Portfiled: List Building Master Class (Free)