I used to procastinate a lot in YouTube, so I installed a plug-in in the browser that don't let me get into YouTube. At the beginning I was worried that it's not going to work for me, because if you use te incognito mode the plug-in doesn't work, so I thinked that every time I would want to procastinate I just open the incognito mode.
But surprise! I'm no longer procastinate in YouTube, because every time that I open YouTube in incognito, the recommendations are sooo bad, that I just scroll a few seconds and get out, and now I'm YouTube free for a long time.