Involved in debating? A great way to learn to speak more effectively is to learn about rhetoric-- the art of persuasive and engaging speech. The following websites are very handy:
http://www.americanrhetoric.com-- this one is brilliant, if you can deal with the exclusively American focus. Lots of speech clips for you to download, while you peruse the texts of the speeches. Plus lots of fancy-schmancy rhetorical terms you can use to impress your peers. Honest!
http://humanities.byu.edu/rhetoric/silva.htm-- lots of definitions, most derived from the original Greek sources.
These ones may also prove useful:
http://www.butterfliesandwheels.com/rhetoricprintall.php
http://stevefournier01.tripod.com/
http://uk.dir.yahoo.com/Social_Science/Communications/Rhetoric/?sort=lf
