Best Practice For Location Of Styles In Silverlight

Where is the best place to put Style StaticResources? I have been putting the global and default styles in app.xaml and the page specific styles in page_name.xaml. Should every control have its own style StaticResource? Is it acceptable to put some style attributes right in the control? I have a page with 5 TextBoxes on it, should there be a style for each when the only difference is a Width or MaxLength property? Or should one style be defined with the common properties for each TextBox and the specific style properties be defined in the control element?