Here is another tutorial on how to take the next step and plot your shape files in QGIS. This is the first step in being able to build an interactive marketing tool that will allow you to review your market area at both the macro and micro level.
In this tutorial you will learn how to add shape files and change their properties to make them easier to consume on the map by manipulating their color and transparency settings.
As always let me know if you have any questions or run into any issues. Good luck!