Originally Posted by Jdoughs

There still is new and 'exciting' ways to do it every day. But the hunt is much more suited for newer hungrier webmasters then old fellas like myself. But since that fateful day 6 years ago when I found my 2 'ins' there has been several methods found. Both blackhat and white, that focus on link generation.(mostly blackhat)

Some of the new approaches (last 4-5 years) that some people have made a lifes worth of money off are:

• Google bombs and Google brute force links
• Dropped domains
• Referrer spamming
• Blog comments and wp-hacks
• Markov content generation scripts
• WP-Hacks and takeovers
• Domain hacks and takeovers
• RSS feeds
• Every popular freehost/blog system has been exploited for back link purposes
• Cloaking, both page and link
• Automated backlink scripts
• 302 redirect bugs and 302 serp takeovers
• Link Wheels
• Page Rank sculpting
• Social Site spamming

Feel free to add any that you know of.