If I can impart two take-away messages both prior to and after delivery it would be these:
Do your hair and makeup prior to delivery. For me? This was an easy task because Carter's birth was scheduled. I say this because there will be lot's of pictures taken those first few hours and you are not going to want to look all a mess. Not to mention that it may be while before your next shower. I'm just being honest.
Bring your own shampoo, body wash and facial cleansing cloths to the hospital. When you can't shower, those facial cloths are going to be your best friend. When you can shower, having your own supplies will make you feel like a million bucks.