This document outlines 5 black hat SEO techniques that should be avoided: 1) building poor quality links from unrelated websites with low quality content, 2) buying links to pass page rank which does not guarantee quality, 3) excessive link exchanges that appear unnatural to search engines, 4) just trying to increase ranks without regard to users, and 5) any unnatural activities that could lead to penalties. The key is focusing on natural SEO through quality content for users.