Download templates that have the correct Windows Phone UX and get the right look every time you create a new app or app page.
Get all of the styles and templates as well as the XAML markup on how to use them to create a native looking jumplist. Better yet, try my toolkit. It has a ready to go JumpList control.
View DataTemplates for ListViews and LongListSelectors that match commonly found list items in the OS.
Get all of the styles that will correct issues with the Pivot control.