This tutorial video will cover the use of groups, components, and materials in creating basic massing.
All geometry in Sketchup should be Grouped to prevent lines and faces from “sticking” to each other. If have geometry that needs to be replicated (i.e. townhouses) you can Make Components these masses to bind their changes together. Materials can be used in sketchup to denote land-use types. This is especially helpful considering material colors and names can be imported by Rhino.