Creating a Drupal Block
From TechWiki
Drupal "blocks" can be useful for notices and special uses and displays on particular pages. Drupal blocks are created using the Views module.
1. Create Block Content Type
It is useful (essential?) to create a separate content type for each different kind of block you anticipate using. To do so:
2. Create the Block View
This step is the most complicated and involved of the three. It is done entirely using the Views module.
3. Place and Configure the Block
More here.
