Designers Who Blog has a series on writing for designers. Definitely a must for every studio owner. project manager, and business developer, as well as designers in general.

Part 1: New Year’s Resolution: Learn to Write
Part 2: Helpful Writing Books
Part 3: Online Writing Guidelines
Part 4: Online Dictionaries
Part 5: Online Writing Tips: Individual articles
Part 6: Online Writing Courses
Part 7: Writing: The Plan
Part 8: Writing: The Writing Resolution
Part 9: Writing: Additional Writing Resources
Part 10: Article: Why Designers Should Be Writers
Part 11: Recap