Today I looked at some video tutorials on how to use Google Sketchup 8.0
I looked at these videos

NEW TO GOOGLE SKETCHUP

Google SketchUp New Users
Part 1 - Concepts
Part 2 - Drawing Shapes
Part 3 - Modifying Tools
Part 4 - Create a Chair

Google SketchUp Toolbar Series
Selections
Components
Paint Bucket
Eraser
Rectangle
Lines
Circle/Polygon
Arc


There are many more tutorial videos and guides available but I think only the above are necessary for creating a chair