Currently, birding. Got really into it in 2021 since it pretty much runs in the family. I feel that observing the lives of our fellow creatures helps me really destress and put my mind off work. Interestingly, I find that birding while walking in the nature works better in this regard than just walking in the nature.

Get a good pair of binoculars, a bird sound recognition app for your mobile[1], and a bird field guide (as a European, I prefer [2]), and you're good to go.

[1] https://play.google.com/store/apps/details?id=de.tu_chemnitz...

[2] https://play.google.com/store/apps/details?id=com.natureguid...