HTML optimaztion

Hi There.

I'm very new to the whole subject nd I've been told that it'll be good for a begining to start taking care of my HTML code first.
I would like to know how to do it?
where to begin?
what not to do as well...

Articles, Exmples and URL's are welcome!

Thnks!

If you really wan't to take care of your HTML-code there is only one way in my opinion, tableless design, also known as CSS-design.

Why? Answer: http://www.hotdesign.com/seybold/

You will find resources at the end of the article. Don't forget to visit CSSZengarden If you think this is something for you, then a visit here could be good:
http://www.csscreator.com/

Validation is important when you are aiming for good HTML-code:
http://validator.w3.org/

Also check your CSS:
http://jigsaw.w3.org/css-validator/validator-uri.html

Then you should check your pages download-time:
http://www.websiteoptimization.com/services/analyze/

Are your pages looking good in different browser's? Install Opera and Mozilla (Firefox). Don't wan't to? Well, check your pages here then:
http://www.danvine.com/iecapture/ Mac could be difficult you say? Well, check it out here (Safari 1.2): http://www.danvine.com/icapture/

Didn't look good? Perhaps you have the wrong DOCTYPE then (it's usual, very few webdesigner's are using doctype correct). The answer is here:
http://www.alistapart.com/articles/doctype/

EDIT: I also see that you have posted this question in another category, don't double-post! Delete this or the other thread.