Using keyboard shortcuts saves you time and makes your tasks complete much faster. These are a few handy keyboard shortcuts that you can start using today:

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Cmnd+M Minimizes the Finder
Cmnd+H Hides current application
Cmnd+K Connects to server
Cmnd+I Opens Get Info window for selected item
Cmnd+Shift+Del Empties Trash
Cmnd+N New Finder window
Cmnd+Q Quits active application
Cmnd+Shift+N Creates a new folder.
Cmnd+O Opens selected item
Cmnd+Shift+A Opens the applications folder
Cmnd+F Find
Cmnd+Option+W Closes all Finder folders
Cmnd+X Cut
Cmnd+C Copy
Cmnd+Z Undo
Cmnd+V Paste
Cmnd+A Select All
Cmnd+Del Deletes item(s)
Cmnd+Tab – Rotate through and toggle to open applications
Cmnd+E Ejects volume, server or media
Cmnd+? Mac Help
Image Credit: bliw.ch