Pinning submenu commands to the toolbar not only provides more direct access, but also serves as a status indicator to a state that may otherwise be hidden. For example, now I can tell at a glance the status of my Excel workbook calculations, and change it if necessary before I make an edit that would trigger a lengthy calculation.

Explore right-clicking and adding commands to your QuickAccess toolbar and see my previous tip about using these with the keyboard for even faster shortcuts.