What are the web development tools you are using. Like firefox and firebug help me a lot with DOM. CVS for managing the code base. debugbar for IE. Can you suggest few of the open source tools that you have been using.
For code i use VIM, for testing phpunit, for functional testing Selenium RC. sometimes use firebug. Very seldom. Because all what i need tested by Selenium. Also always i have under my hands phpshell. Selenium-RC is the solution for tests that need more than simple browser actions and linear execution.