You can work more efficiently within AutoCAD by knowing the keyboard shortcuts and be one step closer to being a power user or CAD Ninja.
Whether it is the one key shortcuts or multiple key toggles it is just plain more efficient and faster to work.
Autodesk has published in addition to the Help documentation a nice web page showing all the shortcuts for AutoCAD. Don't forget you can create your own shortcuts in AutoCAD but I will save that tip for another post.
AutoCAD Shortcut Guide http://autode.sk/shortcuts