Visualizing your server rack with Microsoft Visio 2010 – 4sysops
Tips and Tricks for Copying and Duplicating Visio 2013 shapes
Visio shape connections highlight
Mechanical Drawing & Configuration in Visio
Visio 2010 Modify Stencil Shape Tutorial
How to design your own shapes in Microsoft Visio.
Visio 2010 Freeform Lines and Shapes Tutorial
3.4 Adding Callouts to Visio Shapes
Visio Shape Data and Data Graphics
This video explains how to sort shape data in Microsoft Visio
Find more shapes and stencils - Microsoft Support