Wait, what? Your Board of Directors. They are the governing body of any business, and if that business is yours, then it's up to you to determine who your board members will be, and what qualifications they'll need. An article from Entrepreneur will help you do just that.
It's hard enough running a business, so why not invest in some help? After all, you've got enough work to do running a business. A board of directors won't necessarily do any work for you, but they'll work with you, which can certainly help, especially if you're looking to cement your business among your elite and established counterparts.
You can read more here in the article from Entrepreneur.