HOWTO: Write Magento module

Magento is great, but it's even greater if you know how to write Magento module. I have collected a bunch of articles that published by Magento folks before. After reading some of these articles I'm sure that you will know how to write a magento module.

And here are the links:

• Cash-on-delivery module tutorial by EliasInteractive
  
• A simple Magento custom block by ActiveCodeline
• Custom module with custom database from Magento Wiki
• Sample payment module from Magento Wiki
• Sample shipment module from Magento Wiki
  
• Sample admin module from Magento Wiki

And did I miss any articles that should be in the above list ?