The simplest productivity hack is finding passion. I never seen a windsurfer procrastinate. If you are truly enjoying your work and can't wait to do it, there is nothing going to stop you.
I ensure you that there are many passionate writers, graphic designers and... programmers, who procrastinate a lot.
One of a big finding for me was that it is NOT nearly as much if I like something or not[1]. Is about knowing the next step and maintaining focus (especially with keeping the time "now" not "not now"). (However, I speak from ADHD perspective; maybe for non-ADHD people passion is sufficient.)
[1] For a stark comparison: I procrastinate on open-ended side-projects I love (sometimes for years), but when there is some accounting issue I solve it ASAP.
But it doesn't seem like top pro athletes and olympians procrastinate. They are intrinsically driven.
I don't think you can become a top pro athlete or olympian if you're not the fraction of a fraction of the world's population with immense intrinsic motivation, passion, ambition, and drive -- so this seems like survivorship bias.
There’s a lot of external motivation there as well. That’s three people doing a tremendous amount of work to avoid one of them crying in the corner.
Clearly you don’t have an anxiety disorder.
"Follow your passion" requires a lot of willpower and very often more work than a salaried position, unless you lower your standards drastically.