* Avoid Duplicate pages. Unique is best fitter in a website. Duplicate pages resembles often in Dynamic websites.
*Use 2 or less parameter’s in a Dynamic URL. Try to rewrite your URL structure using .htaccess.
*404 page – Always redirect it to your Homepage or any of your relevant inner pages.
*Avoid discussing or paying for boosting your site to unknown vendor’s .Their main aim to just advertise than to work for your keywords to rank in search engine wars.
*Make your keywords worth a lot. Never belief on treacherous expert advices.
*Live only recent amount of Links in your website. Maximum amount of outgoing links may pull your website power to lack behind.
*Avoid Flash, which may create problem in crawling. Also avoid Black-Hat Techniques.