The document provides tips for making $680 per month from a single blog using Google AdSense. It recommends focusing on one niche, creating quality and unique content, making the blog interactive for comments, learning AdSense placement techniques, blogwalking to related sites, giving free downloads to visitors, optimizing the blog for search engines through on-page SEO and social media promotion, and using various WordPress plugins to boost performance. It also notes it took 3 months for the blog to start generating revenue, but it is now ranked highly and earning money through thousands of backlinks and AdSense ads.