Blackhat SEO techniques are the ones that Google specifically prohibit. But some of them have worked well for me in the past, very well. 5. Link buying: If done correctly it's nearly undetectable and it will make your page shoot up the Google SERP. It's also worth noting that Google only punishes the link seller, not the link buyer, in those rare cases where they have detected link buying. Doing it is simple. You run the search on Google, that you want to rank for? You go through the first 5 pages of results and then you contact those webmasters with an offer. It's amazing what you can get for a couple of dollars. 4. Hoaxing: Hoaxing is when you create a false news story. First, create a fake news webpage/site that looks real. Second, write a sensational fictional news story. It helps if it is difficult to prove the veracity. Submit your story on all the Digg type sites. Fourth, be ready for emails and phone calls from actual media outlets with questions about your story. Eventually, when it is discovered your story is false, try to capitalize on the outrage. Monetizing and harvesting the PR is up to you. 3. Scraping and Spinning: Scraping is when you steal someone's content, spinning is when you change that content to avoid Google's duplicate content penalty. Spinning is usually done with software. The site is usually monetized with Adsense or another PPC program. 2. Web Page Cloaking: This is when you serve up different content to the Search engines than to a human visitor. You do this either so that the search engine does not know that the page has affiliate links on it or to hide links that you want the search engine to see, but not the sites human visitors. I use to work as a web developer and it's easy to harvest link juice from your clients sites without them knowing. 1. Link Spamming: This is automated software that submits contents and links to sites. For instance spamming blogs with comments. There is a little arms race going on between the spammers and the web sites. But if you spam enough you will find many unprotected sites. This will send you both PR and traffic.