Sgt_Kickaxe - 8:17 am on May 10, 2011 (gmt 0)

Basic SEO would include the things you mention, unique and useful content on a well planned and promoted site etc.

If you're referring to the Panda changes however Matt Cutts has mentioned via Twitter that Panda was more of a one-off update that won't be run again until they want to "freshen the data" (ie: not run daily, or "always on"). That means there might not be anything you can do to fix Panda changes besides improve quality and wait until the next time they run Panda.