Everyone wants their computer to operate as efficiently as practical. One of the tips I found through reviewing several sources was to NOT keep unused applications open and running. I have used programs for PC's that allowed one-click shutdown. So after some web searching, I found a neat application for the Mac called Mac Automator that will create a workflow application that sits on your Desktop. Then and with a double-click, it will Quit all open applications and leave you at the Desktop. See Quit All Applications.
Now, to make this process even better, use other features:
.. use F11 key to 'Show Desktop' (remember fn + F11)
.. set Hot Corners in Apple/System Preferences/Mission Control
.. use ⌘+F3 to achieve also 'Show Desktop'
