Facebook is the one social media tool that I use the most. I love following school districts to see new ideas that I could use in my classroom. Teachers post so many fun things that they do with their kids on facebook and it gives me a ton of great ideas.
I also love following the district I teach at to always stay up to date with all of the fun other teachers in my community are doing.
I like following Fabulous Finds by Tara on facebook as she is always looking for sales for people. Since she is a former teacher I find some great things I can use in my classroom on her page. She is a great follow!