So with the new Ribbon on top of the SharePoint 2010 page we have an office like feel to working with SharePoint pages. Customization of this ribbon is great, adding your own functionality augmenting what Microsoft provides out of the box. My question is this though, when is it appropriate to use ribbon customization vs an item menu option (i.e. the callout menu on a particular item).
Are there best practices around this? What do you do?