Here is a recommended list of supplies:
Backpack or storage tub to hold your supplies
Bottled Water (1 gallon per person is recommended)
Non-Perishable food (If including canned foods, you must include a can opener)
(At least a 3 day supply of food and water)
Plastic forks, knives, spoons if needed
Flashlight with extra batteries
First Aid Supplies
Bandages
Ointment
Disinfectant wipes
Tissues
Toilet paper and bags with ties for personal sanitation
Paper and pen or pencil (to take notes, play games, etc)
Sleeping bag or warm blanket (recommend one for each person in your home)
Wrench or pliers to turn off utilities
Personal hygiene items (travel size deodorant, cotton swabs, feminine items, etc)
Loud Whistle to Signal for help
Important documents (identification, insurance information, banking information, wills, etc)
Emergency reference materials such as a first aid book
Battery powered radio and a NOAA Weather radio
Formula and diapers (if there is an infant in the house)
Extra pet food (if there are pets in the house)
Dust masks or cotton t-shirts, to help filter the air
Cups and utensils
A change of clothes for each person in your home (if you live in a cooler climate make sure the clothes are warm!)
Also include a jacket, hat, gloves and closed toe shoes for walking (boots or sturdy sneakers are best)
Rain gear
Cash
Paper towels
Fire Extinguisher
Cards or game (it is important to have something to do to take your mind off the situation for a few moments or alleviate stress if you will be in your shelter for an extended time)