Blogs for students still in school or who have just graduated.
Blogs for folks interested in Certification or just in learning SAP functionality
Generally Applicable SAP Career Blogs
Blogs about the basics: terminology and information about specific subspecialties
Blogs for SAP consultants who want to go to the next level
Blogs about being an independent (a.k.a. freelance) consultant
Hope this helps!
Best regards,
--Tom