I believe you are writing about SEO don'ts mostly? Here's another.. Linking to Bad Neighborhoods.. Being penalized by google before... i know it sucks.. clean up your links and make sure you aren't linked to a blog spam site or other spammy site.
I like the mcdar tool.. i don't have a url for it.. but type: mcdar keyword tool in any SE and it's a pretty handy tool when it works... let's you know your SE position for a key phrase, and tells you your "all in anchor" rank in comparison to your competetion.
Whenever i click on a link up top i have to scroll down to see the changes.. generally this is not a good thing.. The site however is clean with the exception of the scroll issue.
site looks nice in ff and IE7... In IE6 it gets a horizontal scroll bar and your site is pushed out far to the right of the screen... you should fix it for IE6 since a good chunk of the world still uses it.
go to the search engine and type Mcdar keyword Tool. That one is one of the better ones.. gives your all in anchor position and it's very well formatted.