You can see a list of fonts I love in this post, but if I had to choose one favorite, I find myself going back to this one quite often
Oohh...hard to say. I stumbled upon The Inspired Apple from finding Abby on Pinterest. I love her stuff!
If I could pick two, I also follow Clutter-Free Classroom.
Favorite Online Resource:
Right now, definitely Pinterest. As for teacher goodies, I'd choose Teachers Pay Teachers or Scholastic Teaching Resources (especially their Instructor Magazine area).