On page SEO the basics...

On page SEO is making sure that your website is search engine friendly and can be crawled by the search engine spiders, although on site SEO is only the beginning of ranking in search engines its still a very important factor that many people (including web designers) forget about.

• Make sure there is only 1 version of your home page
• Make sure each page has a unique and relevant title tag
• Make use of page description tag's
• Make sure there is only on version of your website 301 redirect all non www. URL's to the www. ones or vice versa.
• Proper use of H tags on page headers etc...
• Write good content, including keywords (make content appear as natural as possible, avoid keyword stuffing)
•   Try to write descriptive URL's, for example yourdomain.com/describe.php rather than yourdomain.com/product.php?cat=169
• make sure all internal links are complete URL's
• Always use ALT tags (research shows that search engines even look at the original file name so try to save your images with a descriptive title like web-munki-logo.jpg rather than 001.jpg)
•  Use relevant anchor text for internal linking within your sites content.
• Make sure your code is valid.
• Make sure your site has an xml site map and submit it to Google using the web master tools, this will help ensure Google and other search engines crawls your websites pages. Also linking to pages internally using text links will help crawling so try to link to each page at least once using descriptive anchor text.

good search engine optimisation is made up of many small factors, and remember every little counts!