Blogs I follow, most of these are Revit related:
Revit Blogs
beside the cursor...
BIM Troublmaker
CAD Notes
CAD Shack
Club Revit
Fear and Loathing in a CAD vs. BIM World
Los Angeles Revit Users Group
Paradigm Shift
Revit Archcenter
Revit Beginners
Revit-BIM Playbook
Revit Fix
Revit Implementation
revit in plain english
Revit Journeyman
Revit MEP
Revit Nightmares
Revit Scratchpad
revit_space
Revit Structure Learning Curve
Revitize - Another Revit Blog
The Revit Kid
What Revit Wants
Who's Afraid of the Big Bad BIM?
Blogs de Revit en Español (Castellano):
Acercas - Consultor Revit
MLR - M. Lucrecia Real
ProyectORevit
Revit - Hecho en Mexico
Revit-MBA
Taller Revit
Venado Revit
Autodesk Blogs:
BIM & BEAM
The Building Coder
The Revit Clinic
Family Jewels - Creating Quality BIM Content
Revit Content Sharing:
Good Revit
Revit Community
Revit Components
BIM Blogs:
[bim] X
All Things BIM
BIM Boom BAM
BIM Manager
RCB Robinz CAD Blog
Revit 3D