If you’re like me, you don’t want to make the move to the ribbon without bringing your custom toolbar with you. This is a fairly easy operation. Go to the Customize User Interface (CUI) window, expand the toolbars tree, and navigate to your toolbar in the Customizations in All Files list. Right-click on your custom toolbar, and select the Copy to Ribbon Panels option.
Then expand the Ribbon tree, Panels tree, and Tabs tree. Navigate to the custom toolbar (which is now a panel) in the panels (probably at the bottom).
Drag the new custom panel up until you get to the tabs. Release on the home tab and when you apply and close the CUI, you will find your old toolbar on the home ribbon panel!
Notes from Cadalyst tip reviewer R.K. McSwain: This is an easy, built-in way to convert existing toolbars into a ribbon panel. If you are wanting to go the other direction (from ribbon to toolbar), see tip #3771.