Principles, exercises, applications...
http://www.youtube.com/watch?v=HVvHxJdIDhk
http://www.youtube.com/watch?v=_acVGyK04pQ
http://www.youtube.com/watch?v=VyRfgDfEJjQ
http://www.youtube.com/watch?v=09S_mk_r58I
http://www.youtube.com/watch?v=T59_mC6Oc8k
http://www.youtube.com/watch?v=4oqCmIns6VI
http://www.youtube.com/watch?v=008Ul85gjGw
http://www.youtube.com/watch?v=2h6dZnjAY3I