I recently found Mitch Jackson’s blog, My Trialblog.  Mitch says the “purpose of MyTrialBlog is to provide all trial lawyers with a one-stop resource to share their trial tips and resources.  Whether you are a brand new attorney or seasoned trial veteran, this site is your tool to use, add to, and generally benefit from.” 

In recent posts, he discusses tips for depositions, power point presentations at trial,  opening statements   and questions for voir dire. 
Check it out.