This document outlines 20 common estate planning mistakes to avoid. Some key mistakes include failing to communicate estate plans with executors and beneficiaries, not specifically bequeathing sentimental items to avoid family disputes, and not periodically reviewing estate documents and beneficiary designations when life circumstances change. The document stresses the importance of understanding one's own estate plans, organizing important records and information for executors, and planning for pets, funeral arrangements, and other post-death matters.