One trick that works for me: having separate devices for separate activities. E.g., I have a tablet that I use for long-form content and pretty much nothing else. I consciously know that I could pretty easily log in to Facebook on the tablet's browser. But since I've never once done it on that device, my lizard brain doesn't know.

I recently bought a new phone that feels physically different than my old one (Nexus 5x vs first-gen Moto X) and I haven't yet used Facebook on it. I think I'm going to keep it that way; I so far haven't found myself automatically going to do it the way I would on the old phone.

"having separate devices for separate activities" This is the answer. My tablet has successfully replaced my PC when it comes to reading twitter feeds, techcrunch and other IT related content. On top of that, i find myself using it only in bed, for 30-50 minutes, right before i put myself to sleep. I am now planning on buying another PC just for work, place it in another room and get rid of the distractions for at least 8 hours per day. In the past i was using Dexpot for managing multiple desktops, but i found out that the temptation of switching and browsing through garbage content was still pretty high.(not just web content, but my own content as well) I'm working on it...

Thanks for sharing. I'm starting this today.

Good luck, and feel free to email/tweet me to discuss further. My big tip: don't ever yield to the temptation to check "just once". I've made that mistake and it's very hard to come back from.