I'm working on my website about CSS and was wondering if anyone here would like to chip in and help contribute content ideas.

Basically: if you have any sort of CSS tips, or advice, or would like to see a collection about something related to CSS (anything!) or even actual hacks or code snippets, or common CSS problems, please post your ideas and requests here and I'll see if I can work them into the new website.

Always start off your CSS with

* { padding: 0; margin: 0; }

Interesting that you suggest that; I find myself doing that frequently with body and form elements, but I don't think it's necessary for everything?

I'd do it for everything because you never know when IE is going to add an additional 2 pixels of padding on to something. I can't think of a reason not to do it.

I think it's a good idea. I haven't done it for everything, but it seems most times when I have a cross-browser problem, that little line fixes it.

Ah, I guess that is a good tip. There's no reason for margins or paddings unless specified explicitly, I suppose. You get more control over your layout that way.

What else?

Images used simply for visual appeal and not actual content should usually be set as a background using CSS instead of an IMG tag. This may be more of an SEO thing I guess but it still gets you thinking in the CSS mindset. On that note, if you have a page header with an image, you should put text within the tag as the content and the image should be a background. To hide the text use text-indent: -9999px. There is a lot more I could tell you but it's more SEO than CSS.