take a walk!
take a naps!

The ONE thing that has had the biggest impact in my career is likely walks and naps.

Some years ago out frustration I decided to pause a project and took a walk (or a nap, I don't remember) and 30 mins later I had a clearer idea of what to test next, a possible solution or something...

Nowadays I don't wait at all to be frustrated, way before that, when I feel myself spinning my wheels, slightly stuck, or just a little slower than what I usually am, I just stop right there and take either a walk or a nap. I can't count all the times in which I've come up with solutions/alternatives/approaches/etc. to problems/tasks/etc.

So now walking and napping IS part of my work. I'll get familiar with the problem, or spent some time understanding the goal and then I'll go for a walk or take a nap. And my career keeps progressing, I'm less likely to snap, haven't been anywhere near burnout for years, raises, and other great stuff, and a huge part of it I attribute it to taking walks and naps!

Give it a try!