other people's thoughts on giving a good talk...

http://blogs.usyd.edu.au/labrats/2007/06/everybodys_talkin_1.html

http://www.scs.uiuc.edu/suslick/seminaronseminars.html

Also, I can't find anymore the posting about how to adapt your presentation slides to people who are color blind, but search for it and maybe you'll find it.. well worth reading over and implementing the advice in your talk... especially if you do imaging of any sort and science.