I would be lieing if I gave you a straight answer, if im not inspired I simply don't shoot because no matter how hard I try, later on Im never completely satisfied with the shots, whereas when im in the right "mood" it just comes naturally
I would say check the
flickr interesigness category and have a look there
Actually come to think of it, reading case studies is more inspiring than anything else, seeing what makes other photograhers tick and looking into their way of seeing thinks and thinking does actually help