good tips, spunky....
but just don't overrehearse... never try to learn a presentation by heart- i did that when i was younger and then at the presentation when i got stuck my only thought was "what sentence came after that one i just said?" so i stopped doing that and just tried to get a grip on what the important thigs are- so when i rehearse presentations now, i know what i'm talking about but i decided HOW i say it spontanously while talking... it works best with me... try it and find out whether it works for you too