Hey, where did my toolbar go?

The AutoCAD window will not "word wrap" your horizontal toolbars if you continually place different toolbars in the same horizontal location.  This may allows you to push some of the existing toolbars off the visible screen. 

If you right-click on a toolbar button and see a toolbar checked in the list, but don't see it anywhere in the application window, start pulling the visual toolbars down into the drawing area to make them floating instead of docking until you find the toolbar that was elbowed out of the visual screen by the other toolbars.  Then just place them back so you can see them all.