I often use Facebook as I have many connections to close friends through groups, I usually 'unsubscribe' from most people and pages to avoid the often the abundance of annoying posts which allows Facebook to become a relatively more bearable service. I also often use Youtube as a 'time-killer' since viewing videos often involves more time. Finally, I use reddit for my quick fix of news and interesting content. I am only subscribed to a handful of non-default subreddits including r/android, r/doctorwho and r/askscience. Hope this helps!
It's my favorite christmas special that the've done yet. Damned with faint praise, though - I haven't really enjoyed any of their christmas specials very much. It was a solid episode, that avoided the tendancy to feel "excessivly fairytale" that the last two christmas specials have had. My primary complaint was that I didn't buy the doctor's motivation for... what we will call the first half of the episode. (to avoid spoiling anything.) Not that I feel that such motivation is impossible, but it was seriosuly undersold.
I absolutely loved it. So many nods to classic who. I recommend watching it if you have the chance!