Outbound links improve your ranking
Submitting your site to the search engines too many times will get you banned
Links from .edu sites are worth more then from other sites
Pages with .php extensions don't rank as well as pages with .html extensions
Search engines won't index pages with query strings/all query strings are not search engines friendly
Using seo software gets your site penalized
Hyphens are not needed to separate keywords in a domain name or URL
Too many hyphens in your domain name will cause the search engines to label your site as spam