I like meditation. For computer nerds, I would explain that meditation is like stopping all background processes in your mind.
I have used Headspace and it was awesome, but it is also expensive. I know that making a modern mobile app is a continuous effort, but $69.99/year is not for me.
Medito is a free alternative app. Interestingly the app is owned and developed by a non-profit organization in Netherlands.
Source: posts/2020/medito.md