The best advice I can give you is don't spam. Post good comments that are on topic. Look for blogs about things you understand. For example, if you like games, look for blogs about games. Comment on games you know or play. If you like cooking, look for blogs about cooking and comment about the recipes....things like hat. Akismet is smart enough to identify generic comments such as "i visit your blog from time to time. really informative." as obvious spam. Note: If you don't already know, Google bot also identifies spam. When your website address is submitted to google, it is crawled, and all words are added as keywords. A heuristic assessment is automatically done and your website ranks as high as the system assumes your site may be useful to users. For example, if your website is mostly about cooking, a comment or post that contains the word SEO will cause a lower rank for that page. Google will assume the existence of the word SEO (off topic to the website) (sudden appearance of the keyword SEO) (low keyword rate of SEO) is an indication of spam. If a page ranks too low, it may even get purged after 90 days if it not crawled again. That means no one will find your backlinks. Google follows internal links and not backlinks anyway. Even if Microsoft.com links to your website, you won't actually rank higher.