Useful links
If you're new to SketchUp and need some help getting started there's a wealth of information available. To point you in the right direction, here are a few useful links:
Google SketchUp resources
SketchUp training videos
SketchUp Blog
SketchUp Help forum
Third party resources
SketchUcation - full of clever people to help you with all things SketchUp
SketchUpArtists - a great place to find SketchUp tutorials
Go-2-School - providing SketchUp and Google Earth training. Check out the SketchUp show videos too.
CG Textures - recommended free resource for textures (use small textures for best results)
Dynascape Sketch3D - a great product for landscape architects using Google SketchUp
IES Viewer - lets you render and preview IES light profiles
3DOn - a cool app to view your SketchUp models on your your iPhone or iPad
PaultheCAD - online store and training resource
Shaderlight links
Shaderlight Blog
Manual activation