I've blocked HN in my /etc/hosts on my laptop. I also recently blocked it on my phone. I can still read it in a VM on my laptop but at least I have to make a conscious decision to view it where as before I blocked them I'd literally type `n` and chrome would auto complete to `news.ycombinator.com` and I'd be 20-30 minutes in before I realized I never consciously decided to start reading.

I have similar problems with the net in general. This happens to me all too often. I decide to do something like take a shower. I walk to the shower and turn it on letting it heat up. I remember something that I want to remind myself to do. I walk over to the computer to type in a reminder. Before I even start typing the reminder something on the screen distracts me. 5-15 minutes go by. I go back to the shower and just before getting in I realize I never typed the reminder. So, I walk over to the computer to type the reminder and the same thing happens again. This type of thing has happened on more than one occasion. For example I'm walking out of the house, at the door I remember something tiny I want to do on the computer (send a mail, write a reminder, ...) same things happen as above.