Undoubtedly the most common mistake that devs do : Ignoring your personal health, be it mental or physical.

I almost went through a burnout before realising things need to change.

Changed my lifestyle upside down after that
- Switched from wfh to an office job
- I cycle 12kms a day now
- Got a standing desk for myself to be more active
- and have a journal where i literally dump everything off my brain