If you are going to be traveling, also make sure you pick up a couple of pairs of foam ear plugs. They are cheap, small, and light, so they won't affect your pocket book or packing plans, and they can be real life savers. You never know when you will be stuck trying to sleep in a noise place (on a plane, train, hotel room next to the elevator or loud kids, etc). Having ear plugs can make the difference between getting a good night's sleep and walking around like a zombie.