Right now through Vistaprint, you can get 100 Personal Business Cards for just $5 Shipped. This is a good price since it includes shipping.
Choose from hundreds of designs to personalize your cards. You could also use these for Mommy Cards (to handout at playdates), for food allergies, or teachers cards (that way parents have your contact info handy). There are countless uses for these cards, so get creative and let others connect with you.