Overcome discipline disruptors.

Overcome procrastination.
Give yourself shorter deadlines to complete goals and tasks. Start working on a task when you are 70% sure you will succeed.

Give yourself enough time for a change.
Be aware of how difficult it is to change behavior patterns, and don't expect to become a completely different person immediately. Be kind and understanding to yourself along the process.

Track your disruptors.
When something negatively affects your self-discipline, write them down and describe your current behavior. Recognize what prevents you from becoming disciplined and work on eliminating those thinking and behavior patterns.