You know how they say "they don't make em' like they used to!"? Sometimes it's hard to beat old school. This was probably the easiest to understand video I've seen, and it's 80 years old!
http://www.youtube.com/watch?v=K4JhruinbWc&feature=related
http://www.youtube.com/watch?v=K4JhruinbWc&feature=related