I have a Bachelors of Fine Arts degree in Graphic Design. I learned my business skills from my corporate world jobs. I keep my design skills up to date by taking workshops, reading design literature and just continuing to design everyday.
The best piece of business advice I can give is: Do your research, make a plan and set up a solid support system. Above all, believe in yourself.
The best piece of business advice someone gave me: Don’t underestimate the power of social media with respect to your business. It’s a powerful tool to utilize.