Get inspired by your successes.

When you succeed at something, you want to do more and more. Even a small victory is enough to inspire. Plan your day so that before lunch you make one or two small victories. This will increase your motivation for the rest of the day. Plan things for the morning that you will definitely complete. For example, go to the gym or answer an important letter. The best way to motivate yourself is to organize your life so that you don't need motivation. If work for you is a constant battle with yourself, it's time to think about changes. Use extrinsic motivation as a last resort, but don't rely on it all the time.