This post is not very exciting but it is important. I have written before about the maintenance of the cage but not the set up. One important factor is that the bottom needs to be solid because your hedgie has gangly legs tucked under that will get caught between wire bottoms. Wire bottom cages will hurt your hedgie so you must have a solid bottom!
Hedgehogs spend thier days resting away from light and they need a hut to hide in. It is important that the hut be large enough for your hog to turn around in. Also key are fresh food and water available at all times and a few toys. Here are some unglamourous pictures of Peggy's abode to give you an idea. (That houff in the corner is Peggy munching her kitten kibble).