Links
The following are several on-line resources I have found helpful:
Looking for a monologue?
This site has pulled all monologues from all of the plays in an easy and accessible format. Invaluable.
http://shakespeare-monologues.org/
Interested in the sonnets?
http://www.shakespeares-sonnets.com/Index.htm
The Shakespeare Society
http://www.shakespearesociety.org/
General Resources for Actors:
http://theguideforactors.com/
http://www.backstage.com/
http://www.actorsequity.org/