Learn how to use the Quick Access Toolbar, showed in the left upper corner of the Excel Window.
In this bar you can put every excel command that you use frequently. The most common are the Save button, Print Preview button, Undo and Redo commands, and so on.
But if you right-click you can enter to the customizing menu, and put the Excel command that you use very often. See in the following video how to customize the Quick Access Toolbar: