Educator's PLN - visit this PLN site to find blogs and make connections.
Click on the links to find some recommended Elementary Blogs you may want to follow. Or try Classroom2.0, Proteacher, and the Edublog Awards. Check out this list from Scholastic, also.
This website describes other tools you may want to use to build your PLN.
A More Complete Guide - doesn't print well, so use online.