I periodically post places to find resources that are supposedly the “most popular” of something or other. I might or might not agree with the criteria used to determine that popularity, but I nevertheless find some useful pieces of information.
You can find a collection of these sites at The Best Places To Find The Most Popular (& Useful) Resources For Educators – 2013 (So Far).
The Top Twitter Feeds in Education Policy is a new “popular” listing that has been created by Mike Petr1lli. It’s worth a look.