I would love to get rid of my smart phone, but the problems I dwell on are very rarely present or future decisions, and realistically what is top of my mind anxiety be damned is useless energy, it's like running a wind turbine off the grid, and forcing it to spin as if it were a big fan instead of running the grid off wind turbines. The thoughts are more like did I disappoint that friend last weekend, or did I dissapoint that coworker at the Christmas party 6 months ago, or did I do <x> that definitely didn't create <y>, but did I do <x> that made <y> happen?
I use chess apps on my phone to at least put my brain off those thoughts entirely because I have a different problem to solve, and that is magnificent, and if If I didn't have that I don't know what I would do. I know there's something probably not quite right, but I'm wondering how much time you end up spending on problems that "can't be solved," and how much is time spent actually solving problems in your life. If that makes any sense.