Discipline is the bridge between goals and accomplishments - JIM ROHN
Self-discipline is much important for success in any field.
like, business, education, job, gym, almost in everything.
It is easy to develop. If you want to,
* Know your weakness and work on it.
* Remove temptation, if you want abs so you need to stop eating fats or eat low-fat food.
* Develop habits which help you to build a lifestyle which more disciplined.
* Eat healthy food and work on the body.
* Change point of view about things and people
It's not as hard as you thought.
Everyone wants heaven but no one wants to die.
Like if you want to succeed you need to put your self in the discipline.