Recently I have put together some code to help with checking CSS styling on sites. Basically I have put together XHTML code that contains pretty much all of the elements you will use in your work. You can paste this code into your project and tell on one page how styling looks in any particular browser.

i have also put together pages containing the basic TYPO3 contents which you can can also import into your projects to check styling.

You can access this code here. I hope it saves you some typing.