Below are a list of things I have found useful in my career. If you have any other helpful resources you feel should be included here let me know via the contact form.
Experts
Who I follow on Twitter
Chris Bryant – CCNA
David Bombal – CCNA
Greg Ferro – Packet Pushers
Jeremy Cioara – CCNA
Joe Neville – Aruba/Python/IPv6
Keith Barker – CCNA/CompTIA
Keith Parsons – WiFi
Network Chuck – CCNA
Rowell Dionicio – WiFi