Habit defines us.
It is simple to keep doing a thing over and over than taking out time to reflex and to address what needs to change.
The more you fill your mind with insubstantial excuses, this amount for the little time you have to Improve. Don't have the illusion that there's always a tomorrow that will take care of today's work (Task). Little excuse like: 'Someone else will do it', 'I don't feel like doing it', 'I don't have the money yet!'... and more could cause you great opportunities.
Know this excuses come as a result of fear of not doing a great job. The real world doesn't reward or applaud those who make excuses, it rewards and applaud those who get things DONE. You may get it wrong in the process, but it is far more applaud-able than giving excuses... There's no better time to eliminate excuses than NOW!