Mostly stock photography sites and forums for developers.
3d total, Pixar Studios, Disney Productions, and search a lot on google.
Too many but above all Google
For information you can always rely on google.
Design Week, friend's websites, other designers' websites, design tutorials
Don't Panic, ID pure, The whole 9, N.Design Studio
Flickr design threads
varies all the time, whatever comes up. AIGA is good for what it is, Adobe for apps, then tis all over the place I have ten thousand design bookmarks at least. Landor is always good inspiration for me. They always had good people.
A lot! But one in particular is http://printpattern.blogspot.com/
There's so much inspiration on there.
Dezeen and Designboom
Too many to answer. I do a lot of surfing I should get an award for just sitting in front of the computer for the crazy hours I put in. lol.
istock photo, creative news daily, indesign tip of the week, adobe magazine