Poop. You'll be picking up a lot of it during your dog's lifetime. And while it will never be a pleasant thing to do, you can make the act of scooping feces off the ground a little less disgusting by choosing the right bag. The Mutt Mitt ($10 for 100) is a two-ply poo bag that's puncture proof, biodegradable, and has plenty for room to accommodate larger, um, deposits.
Image: Intelligent Products, Inc.