Follow some rule it's simple and best for seo.
basically there are two types of SEO.
On page seo and off page seo.
On page seo in this option you should add seo friendly title and description.
If you are using Wordpress then SEO by yoast is a great plugin to understand on page seo.
In off page seo, Blog commenting, Forum posting, sharing latest post to social networking sites.
If you have any question about these point I am always here to solve any problem.