This is what I've been doing lately too. I've taken all apps off my phone that I spent significant amounts of time on. My phone is now something I use for a few minutes, and then stop using, with the exception of navigational apps and music. My goal was to return to pre-smartphone days where having a laptop or a desktop computer puts just enough friction in so that I don't habitually whip out my device and start scrolling or surfing when I feel bored.
Another part of this for me is not going to sites that have infinite scroll. This means that even on my laptop, I will not go to sites where I cannot finish consuming whatever content was there.
For sites like HN where there is a rotating front page, I have an RSS feed of the front page that refreshes infrequently so I can sample what was there without always needing to return to the front page to look for new content. Currently I have this set to 1 hour. This has been a decent mix between missing interesting content and having a feed that shows me way more articles than I can consume. My RSS reader is self-hosted at home, which means when I leave the house I am not tempted to use my phone to read that RSS content.