The Writing Process

Face to Face Training

American Law Institute – American Bar Association
Legal Writing at the Macro Level
Persuasive Legal Writing: A Workshop for Litigators (MP3)
Legal Writing at the Micro Level: Making Paragraphs and Sentences Coherent and Forceful

Kinder Legal
Seattle based, Gary Kinder offers his courses periodically in California. Check the schedule for one near you.
Advanced Writing for Lawyers
Writing Techniques for Winning Cases
 
LawProse, Inc.
Sessions are offered throughout the country.  Check the schedule for one near you.
   Advanced Legal Writing & Editing
   Advanced Legal Drafting
   The Winning Brief

Online Courses

Business Writing Center
Legal Proofreading Skills
Legal Writing Skills

CLEonline.com
Search for keyword "writing" to get the list of seminars available.