Just follow great graphic design studio on pinterest and make your own board to impress inspirations!
Look in to free assocation methods and of course the master arts ;)
It's the Behance Served Website for logos.
Besides, i really enjoy searching for new/classic design studios for some inspiration.
Basically anything this monster touches.
These are great resources! I also just browse pinterest... there are a lot of designers on there pinning some really great stuff. Especially for typographical logos.
You can browse for logos here.
"I don’t care if you like it! I want to know if you understand it."
If you want some real world inspiration that sometimes doesn't hit the portfolio sites, try googling "freelance logo designers" or "professional logo designer" and check out the individual designers full portfolios.
Can (sometimes) uncover some real gems.
Interesting site with reviews and articles
Dribbble.com, Logopond.com, and Google Images... I love the old union logos, so a quick trip down to Google works for me.
Abduzeedo has a lot of theme related posts.
On my top is pinterest, behance and graphicriver! :)
http://www.brandingserved.com/ has to be the one of the best