How Do You Turn Anxiety Into Productivity?

How do you cultivate that? I mean, i love the idea of shifting the rumination and the restless energy into something good. Do you literally sit down and it? What is the process? So here's my process: Right before i'm about to fall asleep, i in, you know, the what if i didn't dothat i didn't do that well enough. And so then i would be up for hours worrying about that. Couldn't shut it off. But what i do now, because i've practised it, is i tell myself, the next morning, i am going to take care of each one of those,. The satisfaction comes when you start putting this