I came across this article about Niksen, a Dutch relaxation technique, which I'm currently trying out https://www.theguardian.com/lifeandstyle/shortcuts/2019/jul/22/people-just-do-nothing-is-the-dutch-concept-of-niksen-the-best-way-to-relax (People just do nothing: is the Dutch concept of niksen the best way to relax?). Thought I'd post it up in case it's of interest to anyone else.