If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
I just started a tumblr (coffeespoonsposts) - which tumblrs should I follow?
The one blog I can really recommend is scientiststhesis. Otherwise I'd suggest going over the Masterlist and see what strikes your interest. The one thing about tumblr is that good, interesting content is often on the same blogs as Doctor Who gifs and "OMG THAT'S SO CUTE!" The signal-to-noise ratio is rather low.