Keep a running list of the items you think you'll need for the sleepover. A few days before the event, note what toiletries you use as you get ready to go out in the morning and prepare for bed at night like soap, shampoo, a washcloth, towels and a toothbrush and toothpaste.
Consider the comfort items you need when you go to sleep. In addition to a sleeping bag, bring your comfy pillow, a stuffed animal or headphones and music if you need them to fall asleep.
Determine what clothes to bring based on the list of planned activities. Pajamas are a given, but find out if you'll need a swimsuit, dress clothes for going out to dinner or old clothing for messy crafts, for example. Pack lots of layers like t-shirts and sweaters so you'll be comfortable no matter how hot or cold the house is.
Check the invitation to see if it's a theme sleepover that requires you to pack additional items. You may have to bring a costume to a Halloween slumber party, for instance, or an assortment of wigs, clothing and makeup for a "fashion show" party.
Add any items that you'd like to share with the group or that might be fun if there's a lull in the activities. Consider favorite compact discs, DVDs, a digital camera, nail polishing supplies or a special snack, for example.
Bring a list of your medications, food allergies and contact names and numbers to give to your friend's mother in case of an emergency.
