If you value your focus, don’t use FacebookGram, don’t read the news, don’t use any social media or Twitter, don’t go on YouTube, don’t watch Netflix, don’t shop on Amazon.com, don’t entertain weird conspiracy theories etc. Also:
Install as many advertisement and content blocking plugins and tools humanly possible.
For example:
Don’t use Chrome; use Safari
Enable ad blockers and content blockers and enable “reader view†by default.
On iPad and iPhone, I use “Purify†and “AdBlockâ€. Best is to pay money for these things.

Get rid of ads and trackers, comments and other nonsense.