If you’re ever in need of inspiration and ideas, there’s a few places to go besides the dozens of ad blogs. A few online archives are listing a lot of advertisement goodies which you can browse to see what’s been done before. Very often when you see an existing idea, you can build upon it without actually copying it, or you can combine different ideas to a new and better one. Whenever I’m short of ideas, I go here:
AdParade lists over 35 categories with plenty of ads.
Ads of the World (AotW) strives to be an advertising library and community site.
(AotW also has a blog)