in my eyes your cheat sheet has a lot mistakes or things that are not necessary.

First thing: URLs don’t need to end on .html, this is proven. It is a recommendation.

Second: Meta-Keywords are almost obsolete, the big engines don’t care on this tag. Nonetheless, using it isn’t prohibited, of course.

Third: „Content should be placed above menu and other stuff“ is highly critical when your menu is above your content. This is against any terms of webstandards and semantics and it definitvely is no criteria. Short: It’s bullshit. Even SEO has its borders.

Fourth: b and i as elements should not be used. They only have a visual meaning. Use strong and em instead, they have also a linguistic (screenreaders) meaning.

Fifth: Even thinking about using the font tag should be punished with writing the sentence „I will use webstandards next time.“ 100 times!

es gibt auch sozusagen einen SEO Guide für Designer. Auch ganz interessant für den ein oder anderen:
http://www.webdesignerwall.com/general/seo-guide-for-designers/