in addition to not doing overtime/weekends, when you're doing work during the day you should monotask as much as possible. just focus on one thing at a time, preferrable until you're done with it.

the cost of constantly shifting attention to multitask made everything seem frantic and you never got the sense to appreciate that a thing was 'done' because there was always ten other things cooking in the background.

you'll be surprised how much this doesn't kill your overall productivity while also preserving mental health. slow is smooth, smooth is fast.