Here's a little exercise that you can do to find out your purpose in life. Pretend that you have been granted three wishes. Think long and hard because you only have three. That is your purpose. The next characteristic of a self-disciplined achiever is that they have a mentor or someone they wish to emulate.
All top athletes talk about someone they watched and adapted their style and made it even better.
The most renown people in the world had a mentor. General Patton studied Hannibal. We all have people that we learned from, perhaps a parent or teacher. The top achievers have learned from someone they wish to emulate. Anthony Robbins says that one of the great success strategies is to model what works.