So, how do I turn this day into something I consider productive?
I have a lot of Pinterest boards. This means a lot of pins I don't look at again. This evening I went through previous boards and re-pinned items to my new board for the 2018-2019 school year. That board has sections with all my classes for the year. Then I pinned resources to boards specific to things I plan to teach and subject areas so the boards become more meaningful.