This video tutorial provides instruction on categorizing blog content using the core taxonomy module. This preview version focuses on adding categories that you select from a drop down list. The premium version contains additional content as indicated below.
This video shows the user how to use the views module in Drupal 6 to create a page that list nodes with a certain taxonomy term. For the screencast I created a view that lists all of the nodes tagged with cck or views at http://www.learnbythedrop.com/cckandviews.