Keeping with the theme of animations, one of my favorite presentation techniques is the staged animation you can create when you place section planes within groups or components.
The animation below is one I created for the Google SketchUp Cookbook, written for intermediate and advanced users.
You can download the SketchUp file for this model from the 3D Warehouse. Click through the scenes to see each part of the model grow or shrink.
Below is another one I like: it's an animation of building a car, containing view changes.
You can get this model here.
Anyone can design anything in 3D! www.3dvinci.net