Can't believe how dumb some of you are, Search engine optimizing is a process that can take months to accomplish.
You are asking for "seo" but do you have a clue what you want to rank for? Which keywords are you aiming for? How much search volume do these keywords have?
Do you want on-site seo? What do you want to optimize your website for? How do you want to be found in the search engines?
Your request is so broad, what do you expect?
Search engine is a process of time, link building & optimizing for keywords.
Are you looking to make profit from your website? Are you looking for just your average download visitor?
Are you after backlinks? What kind of backlinks? Would you mind black-hat or do you want your backlinks to be build natural?
Is your content unique? Do you know what search engine optimizing is? Do you know that google doesn't like duplicated content? Is your content leached? What are you doing to prevent google from seeing your content as duplicated?
Do you have a Sitemap? Do you use RSS? Do you submit your RSS? Do you ping your RSS?