This blog offers simple good advice and instruction from an MCSE. There are practical tips, answers to common questions and a few product reviews.
Cisco press gives you short glimpses into their many certification titles. It's a preview before you buy kinda thing.
This blog, written by two CCIE's, focuses on Cisco security topics, particularly as they pertain to the CCIE Security Certification. This is a great resource. These guys share both certification experience and technical know-how.
This is literally one person's blog on what to study for CCIE Routing and Switching.
This is a blog dedicated to Citrix training and certification news. It's not the most updated or dynamic blog out there but it keeps you on top of the game if you are interested in citrix training.
This highly technical blog is run by a self-proclaimed "Cisco Freak" and covers a ton of topics, from study topics to frame-relay commands.
This blogger is out there talking about certification and technology news and reviewing products relating to certification. Huh. Sounds familiar.
This link takes you to a small portion of this blog that focuses on certifications in the fields of Hacking, Forensics, and Ethical Response.