I spent a good chunk of time trying to find the best solution for controlling inventory on an Übercart I've been developing for a client.

The biggest issue is that by default Übercart doesn't stop customers from purchasing out-of-stock products.

You can speed up your drupal load times a bit if you compress or aggregate your css files. Drupal can do this for you!

Simply visit Admin > Site Configuration > Performance and enable Aggregate and Compress CSS files. Submit the page and check out the results. All of those @import() calls will be condensed and you'll notice just one css is loaded.

A simple diagram showing distinct elements of a web page

For simple websites it's handy to separate elements that are shared across pages, such as your header and footer.

Often when developing Drupal, you'll have multiple roles that you'll need to test. Generally, I'll be logged in on one browser as admin. I'll have another browser open for another role.

So I go in and make a change as admin, then visit the other browser to see how the change affects the other role.