THE Useful PowerPoint Tip
Heres a useful tip I thought everyone should know:
When a slide is selected in PowerPoint (either in Normal or Slide Sorter), while F5 will start the slide show at the FIRST slide, pressing Shift-F5 will start the slide show at the CURRENTLY SELECTED slide.
If I see one more person using that TINY slide show button in the tiny lower-left-corner of PowerPoint :)
Also, just for fun, here's the famous PowerPoint that Abe Lincoln used at the cemetary dedication at Gettysburg.