Presenter View

Another question from Superman:

Answer:

If you have PowerPoint 2002 (a.k.a. PowerPoint XP) or PowerPoint 2003, you can
use
Presenter View.

While all the audience sees if your normal slides, you the presenter can:

• View thumbnails of upcoming slides.
• Click a thumbnail to jump to a particular slide quickly.
• See your notes.
• See the elapsed time.
• Black out the screen (though there are
  other
  ways to do this).

To set this up, your machine must have support for multiple monitors. 
Almost every laptop I've ever used has this built-in so you can project on a
screen while still viewing stuff on your laptop screen.  To do this on
a desktop computer though, you probably need two video cards.

You also need to make sure you're not using monitor mirroring:

1. Right-click your desktop and click Properties.
2. Choose the Settings tab.
3. Click the picture of the other monitor.
4. Check Extend my Windows desktop onto this monitor.

Once that's done:

1. Launch PowerPoint.
2. Go to the Slide Show menu | Set Up Show...
3. In the Multiple Monitors section, check the Show Presenter View checkbox. If this is grayed out, you don't have multiple displays set up correctly.
4. Then choose which monitor you want to display the slide show on.