This is how Lotus Notes Knowledge Cafe for Team Collaboration breaks some stuff down. Adapt this to my own needs:

Calendar and even Management

Calendar, To Do, Meetings, Tutorials.

Team Configuration

By Members

By Team

Document Management

Category, Type, Presentation, Hot Topic

Team Discussion and Issue Management

Issue, Category, Due Date, Priority, Author

Forum

Author, Category, Dare

Personal Document Management

Calendar, To Do, Meetings, Drafts, Favorite Documents.