Best Practice: Design the service with a broadly balanced navigation tree where numbers of links on pages is balanced against depth of navigation.
Commonly 3 clicks are considered the acceptable limit to reach any part of the site. Make sure you don't have a section that is too articulated or users might get frustrated and not be able to reach the content desired. A search functionality might aid.
Techniques available for this Best Practice:
To add a technique for this Best Practice, create a descriptive WikiName for it, start with the TechniqueTemplate and make sure to add the name of this category in the content (or as a category tag). See also HelpOnWritingaTechnique.