Public speaking is one of men's largest fears. Believe it or not.
yup
personally, i always loved talking, explaining, etc.
i'm a people person, and crowd person.
i actually had to get used to it, when i was 13(freshmen) i accidently took a class for seniors, and it was 3 diff. 12 min. essays, and i rocked the last one.
ever since then i been really good at public speaking for any occasion. i go to a dumbshit community college, where i usually know more than the teacher on most particular subjects, and i end up explaining things or asking inquisitive questions to the teacher for about 15-20 min. thats a good way to get used to public speaking, and not caring what people are thinking.
basically, you just gotta realize that everyone is gonna make a judgment but it still is flawed and the less importance you put on unknown judgments the more confident you will feel. PLUS practicing your speech infront of people you know well(family), then friends, then a group of class mates is a great idea. it helps you transition from 'comfort' to 'less comfort'.
unless you are using a lot of facts, i don't suggest using notecards because people tend to get confused looking at them(because they are small), end up reading OFF of them, and end up looking tacky. I would leave my outline of my speech(i've done probably 10-12 long formal speeches throughout h/s and college) and just walk around and go near the podium or desk that has my outline, for a second and remember the next chunk of info i was goign to explain.
So, i'm not sure what you are speaking about, but i would probably walk back to the outline 4-5 times since its 20 min. long (once every 5 min. is a good interval)
=) hopes this helps