I had been using the default page templates on a development installation of WordPress which is a direct copy of another WordPress installation. During the process of editing some pages I decided I wanted to try a couple different types of page templates. The templates were exact copies of the default page view but with one line of code modified such as not displaying the title of a page.
One of my favorite themes for WordPress is the Mandigo theme provided by a great developer named Tom from OneHertz.com. The theme is highly customizable and provides ways to customize things outside of the core files so when you upgrade you are not required to make all the modifications over again. I suggest anyone looking for a 2 or 3 column WordPress theme to check this out. One thing I like to do after installing the Mandigo theme is to modify the order of the header navigation. The header navigation links are dynamically generated from top level pages you have created. Below are brief instructions on how to make sure the order of the header navigation menu is in the order you want them to be in as well as a brief description of the code that allows this to happen.
There are some great ZenCart addons to be able to track your stock by attributes and enhance the checkout process for customers while doing so. My suggestions below are based on personal experience and require very little effort to get up and going.