The "Big Four" Advisors

Pamela Slim writes "about the 'big four' professionals every entrepreneur needs to run an effective business:

A lawyer
An accountant
A banker
An insurance specialist

These professionals can ensure that you set up a solid foundation for your business. Often, entrepreneurs try to "bootstrap" everything and only call in an expert when they are in trouble. Investing in the right professional advice early on can save you headaches, or worse, in the long run."

Via this startupspark.com post.