[development] Tips for a new developer

Hi, I am beginning to develop for drupal and plan to use it as my framework. I've been using Zend for a while so I am still trying to get used to the way things are done. So far I have some questions about strategies for development since I try to follow a TDD methodology (test driven development) where I develop the tests first and then go actually developing the code that performs the expected behavior. If possible I'd like to receive any tips / tutorials about module creation and testing methodologies. Regards.