[Rnonymous]

I was using selfcontrol during my studies. It works by temporarily blocking certain domains on your hosts file. Happy to see it still exists, and free

https://selfcontrolapp.com/

[Retr0id]

My version of this is having custom ublock filter rules for my set of "timewaster" websites (HN included), I comment/uncomment them as needed.

[dopidopHN2]

Self control is great. I've been using it for a solid decade.