The best off-page SEO techniques are blog commenting, article submission, forum posting, directory
submission, social bookmarking on high PR site. Also yahoo answering and share link on social media is
the best of page SEO technique.
I have read all the replies provided here and cover all kinds of off page techniques which i have used till now. But if are talking about the best technique then i would like to say that: Blog commenting on high pr and relevant blogs, social bookmarking, Guest posting, Yahoo answer, Forum Posting, Comment luv, Article submission on high PR , Web2.0 are the best off page processes.