Baby's day out! Shop and Drop
A few things to keep in mind:
Never go out shopping with the idea that you will finish what you started. Also, if you need to make certain decisions or more than a couple of choices (furniure shopping for example) its better to leave your little one with a sitter (family or friends). If not, be prepared for plenty of peek-a-boo, some distractions, and screaming.
Timing is everything so be sure to let your toddler have adequate sleep before you start. Early evening is best but babies and toddlers seem to have the most energy at this time. Snacking will tend to keep them happy (healthy snacking that is). It's also very important to keep track of meal times in between as we all know how distracted and forgetful shopping can make us.
Stroller toys will keep them entertained but only for a while. It's best to have a couple handy so you can switch between them.
The last bit of advice I have is to always carry a pair of night clothes while you're out (shopping or othwewise). Make the change just before you head home so you'll worry less about having to wake the little munchkin to change a diaper or clothes. So here's to a good and refreshing shopping experience. If it does get "crazy" just remember "you're not the only one".