The sites I use to do what I do:
The best movie database, many of the movie posters and short descriptions you see on the site come from here.
And of course, where would I be without Wikipedia? All the miscellaneous data I use comes from this site.
The Hollywood Reporter
The best place to find entertainment industry news, this is where I find the Snippets.
A fantastic critical aggregate site (an alternative being MetaCritic) that I use to see if I agree with critics and audiences in a general sense.
Box Office Mojo
The best site for pretty much anything money-related with movies. This is where I find the info for the Box Office Recaps.
I don't really use anything from this site, but it's still a great read!