Link Building techniques

Over the last 8 years I have developed a list of strategies and techniques for link building for a website. This is a very broad classifications of activities. The effectiveness of link building techniques is usually different for different industries.

• Directory Submissions
• Article submission 
• Press releases
• Social media profile creation
• Social Bookmarking
• Guest blogging
• Local listing like Google places
• Create link wheels using social websites and web 2.0 sites
• Identify where the competitors are getting inbound links from. Approach those resources to find out if you can get a outbound link from those sites. 
• Add your self to yellow pages and local business listings.
• Participate in forums and discussions and use signature with a link back to the website if possible. 
• Guest blogging on other blogs which are in the relevant industry with link backs to the website. 
• Use http://www.beaucoup.com/ to find vertical engines and directories and get listed in them
• Participate in question and answer websites by answering questions related to your business or website. 
• Paricipate in discussions on Facebook, Twitter, Flickr and LinkedIn.
• RSS Submission if possible
• Blog submission if you are running a blog on your website
• Create video content and submit to various video hosting services like Youtube.com and metacafe.com
• Create documents like infographics and PDF documents and submit them to websites like Scribd.com and similar websites. 

Is there a technique that you have used that is not mentioned in the list the please share it by adding comments below.