Motivation is the inner power that pushes someone towards achieving a goal. It is the general desire to do something and is the most important key to success. To motivate oneself, one should have a cause or dream, focus on their own progress rather than others, take continuous steps forward, and not dwell on the past. To motivate others, one should treat people kindly, give them responsibility and listen to them, set ambitious but achievable goals, get to know individuals, and ensure clear communication.