I have a ton of rules, but my top recommended rules are:
1. Always practice what you're going to say out loud. Practice in your head is worthless. Your ears must hear what you are trying to say.
2. Never deliver a presentation by rote. Practice is to give you a safety net so you have something to say. Speak what you think, not what you've written.
I rarely actually practice giving a presentation. But, having written the paper, reviewed the paper, and put the power point together, I know the material that I'm going to be presenting. I have never read my presentation to the class either. I find that if I "prepare" too much before hand, I tend to screw up more.
3. Slides are for augmentation. If you can't deliver your presentation without them, your presentation is broken.
4. Never do worthless things just because you think you need to. Classic example: "I don't know if you guys can read this slide, but down here it says..." Having a slide no one can read is a classic example of someone doing something because they think they are supposed to (have a slide with a ton of text on it) that is worthless. If it doesn't help deliver the presentation, lose it. If you want to give the audience a ton of text, send them a book after.
I wholeheartedly agree. Slides are there to get the bullet point into view, not the entire presentation. If I use a graphic background for the slides, they usually will have something to do with the subject matter, and are unobtrusive. I want the text to be what catches the eye. But, plain text on a white background is boring. Learned that from my Comm 101 instructor.
5. Be yourself. Unless you're an actor, in which case by definition being yourself means you like to pretend to be other people. If you're not, trying to be more serious, more funny, more interesting, more anything than you really are is going to look stupid. It never works.
In my case, I act like a guy who isn't all that uncomfortable giving presentations. It seems to work well for me.
Actually, I should rephrase that to, "I play the role of a guy who is comfortable giving presentations".
It's just an offshoot of Role-playing games. What would Jimmy the presenter do in this situation?
What would Kalidor, Warrior-Priest of Peoni, do in that situation?
What would Torven say if he was caught stealing a ruby from a wizards shop? (Answer: The ruby was just laying there. ok? <--- that actually happened.)
I have way too many voices in my head.
I don't think I'd make it as an actor though. I value my privacy too much.
Fortunately for me, none of my jobs have required me to do any speechifying.