Go, Go WordPress Widgets!
Every WordPress theme has one or more sidebars in it (in the case of this site, the sidebar is that gray section on the right hand side of the screen). Sidebars contain widgets, which are modules that show specific types of information such as Archives, Links, or Categories.
The next step after choosing a theme is to configure these widgets. This is done by going to the Appearance->Widgets screen. You can drag and drop widgets in and out of the sidebar. You can also reorder the widgets in the sidebar by dragging them around. Most widgets have some sort of configurations settings (as show in the screenshot below).
