Milestones: Sometimes, groups of tasks need to be done by a deadline. Milestones allow you to know what tasks on your list need to be done by a certain date in order to finish the project.
Calendar: The Calendar view provides a monthly snapshot of all tasks that need to be done within a project. You can view both individual tasks and milestone dates here.
Pages: Sometimes it's useful to document project knowledge in one place. Pages are wiki-like structures created by one team member, but can be revised by anyone on the team.
