Most Helpful Guy
It's been a looooong time since my high school photography class, but I'll give it a go.
The first thing you need: a camera :P
This all depends on whether you are shooting digitally or with actual film. Make sure your shutter speed is properly set, otherwise the photo will be blurry. The subject of the photo must be centered; if it is a whole person, don't cut off their feet or the top of their head. Lighting is key. Turn off the flash if there is sufficient light. When you do have the flash on, avoid as much as you can a reflective surface. Developing a roll of film will take about an hour.
And that's about all I can remember. I enjoyed photography, though. I'd recommend looking at the photos in your local newspaper. I'm sure you'll have fun.