Tim Gruber and Jenn Ackerman use both photography and video to tell stories for editorial and commercial clients. 
ADBASE has some helpful articles focusing on business issues that we all face as photographers and creatives that are worth the time to read.
The Secret to Business Growth: Client Satisfaction
Bid Fair, Bid Smart: How to win jobs with savvy estimates
Buyer Insights to Power Up your Fall Marketing
Email Marketing: Find and Speak to the Right Audience