The shield and sword form the basis of most all Belegarth combat. To do well in this game you need to know the basics of sword and board, if for no other reason than to recognize an opponent's weaknesses.
After you have digested the basics from the Training page, the links below contain a collection of some of the best videos to help you in fighting 'Sword and Board.'
Fighting Lefties
Left-handed fighters are often at a significant advantage in the game since the vast majority of fighters are right-handed and not accustomed to the adjustments necessary when fighting a lefty. The following videos will help prepare you for taking away the lefty's advantage (or developing it, if you are the lefty).
One of the best ways to improve your awareness of your own mistakes and identify areas to improve once you understand the basics and know what to look for is watching skilled fighters. This album contains video of many of the matches fought in the sword and board tourney at Beltaine 09. There is some excellent skill displayed.