Write resumes as you would a short persuasive brief. Organize the content to immediately highlight your strongest points. Show results, not just titles. Be descriptive of your qualities. Adapt resumes for each type of position you seek, and include items that set you apart from the rest of the candidate pack.
Simplicity is the key to cover letters.
Make a letter approachable and be honest. Understanding by the reader is essential. A cover letter is your personal public relations piece. Be prepared to overcome objections to your credentials or experience. It's up to you to market your legal and nonlegal experience to all employers across the board.