The Poetic Prophet may also be known as The SEO Rapper, but his Design Coding rap contains a lot of good advice for an HTML/CSS designer.

All we have to do now is convince him to rap about RDFa!

...title everything including links and images
don't use italics, use emphasis
don't use bold, please use strong
if you use bold that's old and wrong
when you use CSS, you page will load quicker
client satisfied like they eating on a snicker
they stuck on your page like you made it with a sticker
and then they convert now that's the real kicker
make you a lil richer, your site a lil slicker
design and code right man I hope you get the picture...

Source: Design Coding

Spotter: ROFLCon Sleeper Hits Session.