Logo design?

Today ive been really thinking about what i want to specialise in..... i really enjoy logo design, it is definately my favourite breif to do.

i have been searching through the net and have found some real useful sites:

http://www.logodesignlove.com/

http://logopond.com/

http://www.brandsoftheworld.com/

http://www.graphicdesignblog.co.uk