Job interview best?
Working with your crush best? Your boss's boss is working one on one with you the entire day best?
The problem with procrastinating is that it works. Didn't study for a test and still aced it= apparently didn't need to study for that test (I was the king of this, "Pleasure to have in class/excellent test scores/deficiency in homework" every time). Every once in awhile is fine, but when it becomes habit it undercuts your growth significantly. You miss on building the foundation that takes you from good to great.
If you can survive doing things last minute you never learn how it feels to be at your best.
How often do you show up looking, feeling, and mentally prepared to give it your all in your personal and professional life? How much easier would it be to hit your goals if you did?