The primary view that you will need to interact with the Eclipse plug-in is Pending Change Set View.  This view will allow you to see at a glance all of the changes that you have yet to commit to the repository.  To open the view, choose the Window->Show View->Other… menu item.  In the Show View dialog, select Vault Professional->Pending Change Set.

To open the Work Item Tracking View, choose the Window->Show View-> Other… menu item.  In the Show View dialog, select Vault Pro->Work Item Tracking.