I think i am somewhere in your corner regarding the ever seductive effects of medial junkfood ;-)
My solution - not mentioning my current "fasting period" - was to migrate to Plan9 (or more precise: 9Front). I CAN do every productive thing i need (but need to get creative in doing so sometimes), even things like youtube DO work, but everything requires a bit of tinkering and every single line of code in this system seems to be designed to keep the addictive sides of the web / modern computing at bay.