One slick trick I often use is in slideshow mode you can jump directly to any slide simply by typing in the slide number then hitting enter.
This is great for a large presentation with diagrams that you are taking questions on at the end (put slide numbers in the footer) or can be used for any size presentation simply to jump to roughly the right place at any time, especially if you have slides with a lot of animation or are only revealing one line of test at a time as the "PAGE UP" method will only step back one action and not necessarily the whole slide, this can become frustrating for your audience.
Thank you for that Billy - that's definitely a nice trick. I hadn't taken that bit in from the end of Dave's message.
Today I tried something new to wow the audience with technical magic. We have flatscreen TVs on the wall in some rooms, and connect a laptop for presentations. I used LogMeIn, which is a remote access website - you normally use it for technical support or to access your work PC from home. I had a laptop connected to the TV with the lid closed, and another on the other side of the room where I was standing, also with the lid closed. I was remotely accessing the laptop under the TV with LogMeIn to click through the PowerPoint and do other stuff. Everyone wondered how this "magic" worked.