Most people believe discipline is about willpower — the ability to force yourself to do what you do not want to do.
Willpower is a finite resource. Discipline that depends on willpower will always eventually fail. Real discipline is about identity, not effort.
When you try to discipline yourself through force, you are fighting your own identity. The person you are trying to become is in conflict with the person you believe yourself to be.
The shadow of willpower-based discipline is shame. Every failure becomes evidence of weakness, which makes the next attempt harder.
Ask: Who is the person who would naturally do this? Then ask: What would it take to become that person? Start there.
Enter a room. Read a teaching. Hear the voice. Practice the work. Keep the wisdom.