I have seen some great figure photo shoots but it always comes up short due to one factor, the ISO. ISO also known as film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales. If you want to learn more about, wiki it because it's too damn long to explain.
Now that you finished reading that long ass article on wikipedia, let's look at some examples. With newer models of digital cameras, the ISO can be manually adjusted between 80 to 1600. Keep in mind that the lower the ISO, the better the shot is going look.
When I take pictures with my ISO at 80, I use a tripod because any little movement will make the picture blurry. If you don't have a tripod, you can learn some great anti-shaking techniques over at Digital Photography School. I hope this post helped those who are having trouble with any form of photography.