Full Steam Ahead, a UK documentary about trains and steam power and how they changed the world. Other documentaries featuring the same presenters are quite top notch as well with special mentions to Victorian Farm and Secrets of the Castle.

I believe they all can be found on youtube.

Change locations. Always writing in the same place is good for habit building but a few times this year I've been blocked. Decided to head down to the library recently and try my luck there. Just a one off session. It was more distracting, to be sure, but I feel like it helped get me back on track.