Many value a computer mouse over a keyboard nowadays. There is less to remember and the use of menus give us easy access to everything we need. We even have touch screens now that can save us seconds of time now that we do not need to drag the mouse across the mouse pad. With all of this innovation many do not even see the value of a keyboard, with the exception of typing and the few shortcuts that they know. The truth is that keyboard shortcuts are not only for computer geeks and they increase ones speed more than any touch screen could ever dream.
Many who will read this will know their fair share of keyboard shortcuts, however many people only know few, if any, shortcuts.
In my brief experience with the Vim text editor I learned to love my keyboard. Shortcuts allow you to get things done much faster with just a few keystrokes. A control+c here saves two clicks and a shift+control+directional key will allow you to select a few words without you needing to leave the keyboard. The speed took some time to master, keyboard shortcuts are many and require some time to learn, but the results well made up for the time.
I have talked about the application launcher Launchy before (If you are on a Linux system with KDE you can use Krunner), it allows you to launch programs without leaving the keyboard. Application launchers paired up with a working knowledge of shortcuts can lead you to a place where you do not need to reach for the mouse so often. Knowing your shortcuts can greatly increase your productivity in work, school, and even in play.
Wikipedia has an exhaustive list of universal keyboard shortcuts that I highly recommend you take a look at. In the future I will post more on keyboard shortcuts and how to make your own.