Great (free) SketchUp Tutorials by Google
Self Paced Tutorials
Google created a series of self-paced tutorials (SKP files), that teach various concepts. Newbies should check out an Introduction to SketchUp. Advanced users should review Introducing Dynamic Components.
The full list of tutorials is available at sketchup.google.com
Video Tutorials
Google has created and posted a series of video tutorials which range in scope from drawing shapes to creating a lens blur effect with SketchUp and Photoshop. You can find all of these videos at http://sketchup.google.com/training/videos.html
Beginner Tutorial: Using the Tape Measure Tool
Advanced Tutorial: Creating a Lens Blur Effect
The SketchUp Blog
The official SketchUp blog is a great resource to follow for both new and advanced SketchUp modelers. http://sketchupdate.blogspot.com/
