SEO is a very specialized and a huge topic to be fully covered in such a small article but still few tips about SEO are given below , categorized in four categories
1. Content Quality.
2. Web site Structure.
3. HTML Guidelines.
4. Search-friendly URLs.
5. Meta tags ie. Title, Keywords and Description Optimization.
6. Off Page Submissions like blogs and Forums submissions, Press release submissions, Article submissions, Directory submissions etc.
7. Social bookmarkings and Link Buildings