So I've gone the other way: everything that is distracting (fb, twitter, reddit, ideally HN but android apps suck for this) is on my phone.
Then, my computer is for work, and my phone is for being bored. That way (in theory) there is no reason to be logged into timesinks on my computer, so I can use it without distraction.
I think this also makes a great use case for an iPad. I have hosts-blocked all time sinks on my Mac, and unlike on my iPhone, I don't even have much time to use my iPad.
I do miss the convenience of a physical keyboard in FB discussions, though...
This is the best thing I ever did. On my work PC there are precisely zero 'leisure surf' items in my browser history. If I am working with someone then that autocomplete is never going to suggest anything other than work related. Switch to any tab, same again - work.
I go for a walk at lunchtime rather than read clickbait. Even if I work s-l-o-w-l-y, at least I am working rather than brazenly procrastinating. I never take my work home, I just get in early and get it done.
This 'regime' is like freedom, it does not require any discipline, now that I am set into it I see no reason to change. The news will still be there when I get home, as will sports results, HN and anything else. I have no need to read any of this trivia at work. If I want to read I have plenty of time for that outside of work where I can read something more substantial on my own clock.
We had a bright intern with us recently, he needed little help, however, I was most keen to stress to him how liberating it was to not recreationally surf at work and to have a phone for personal emails.
Then, my computer is for work, and my phone is for being bored. That way (in theory) there is no reason to be logged into timesinks on my computer, so I can use it without distraction.