This document summarizes 21 principles for overcoming procrastination and increasing productivity from Brian Tracy's book "Eat That Frog!". The key principles are: 1) Set clear goals and priorities by writing them down; 2) Plan each day in advance by making to-do lists; 3) Focus on the most important 20% of tasks that yield 80% of results; 4) Consider the long-term consequences of tasks; 5) Categorize tasks into A/B/C priorities and do A tasks first; 6) Identify your key areas of responsibility and weaknesses; 7) Accept that there is never enough time for everything and focus on the most important tasks; 8) Prepare thoroughly before starting tasks; 9