Sometimes I simply shut down. This happens when I'm overwhelmed but I don't realize I need a break. Then my unconscious mind steps in and takes charge. My UC mind is my BFF. She loves me.
I rarely relaxed during my working years. There was so much to do, and it all seemed earthshakingly important. Then UC mind would swoop in like the super hero she is. I would find myself forgetting appointments and meetings. It was wicked, sinful, glorious. Letting your unconscious "have at it" is a bit like having a personal assistant.
Over time I had more demanding jobs, with increasingly difficult people to accommodate. I became a supervisor and you know how that goes (hint: STRESS and confrontation). I was a manager of large academic and research departments. These jobs were ridiculous. Ick.
I have said this before, but I'll say it again because it is key to who I am in my dotage: For most of my life I had minimal control over what problem happened next, and maximum responsibility for resolving it.
In retirement I've stopped answering my phone. What a joy it is to let that sucker ring! I procrastinate with gusto. I'm good at this retirement thing.
When it is not hotter than Hell, I might power garden for hours at a time. Gardening is hard work, but it is also like meditation. Get your hands in the dirt and the cares of the world fall away.
Sometimes that's what I consciously want, for all the cares of the world to fall away.