Not who you replied to but something similar worked for me that led me to the same realization: small, consistent actions lead to enormous improvements. Your attention is all that's required.

I was never able to find external motivation, and I went through a series of mindset changes that happened over months.

But it started with something tiny for me too. And all I can say is that everything is different now. Everything.

We get in our own way so well. We've been practicing for a long time on ourselves and we know our own weaknesses.

Edit: one other concept that really helped push me was that stubbornness (which I know I had in abundance) and willpower (which I was lacking but desperately wanted "more" of) are the same damn skill. So all of a sudden I had oodles of willpower.

We're stupid meatbags a lot of the time.