I take breaks.
My long-term fitness goal is to do 10K steps per day on average over the course of a full year. It forces me to go out and not be attached to a screen. Do 20K steps on a good weekend day and I get a bonus – the strong desire to have a nap.
I read paper books. This way I disconnect and relax more than I would if I read e-books and am exposed to pings and distractions.
I don’t know if these methods are effective. Ask me in 10 or 20 years.
Veselin.blog 
Walking, for those that can, is such brilliant exercise. It’s even good for the pressure in your eyes.
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