In PowerPoint XP animating slides is simple. Just follow the step-by-step instructions provided in this free lesson.
Once you choose an effect, decide the direction for that effect. For example, you may want text to fly in from the bottom. (Just make sure your animation doesn't cross important graphics or text in your presentation).
Decide the speed at which you want effects to happen in your slides. You can choose very slow, slow, medium, fast, or very fast to fit the rhythm of your presentation.