Create a separate Mac / Windows non-admin account just for coding? I’m sure there are parental control measures for either platform. As time goes you can update the deny list of web sites.

Another thing that helps is recording your screen for the whole day. Once you start doing review in the evening it will create back-pressure on the monkey brain that jumps to distractions.

Yet another thing is to setup a separate computer. You can browse crapnet as long as you want, but you have to walk to another desk. The back pressure is subtle but has long-term effect and requires very kittke will power.

>Create a separate Mac / Windows non-admin account just for coding?

Yes, I got as far as creating a separate account on my MBP a few years ago and I do programming and open source stuff with that account. And it has helped quite a bit! Although it's not perfect (case in point, I am here on HN right now).