What you need to be prepared for a disaster
Hopefully you will never need an emergency kit, however the way the weather is and the world for that matter, you probably will at one point or another. I have went through several bad storms and the big kahuna Hurricane Katrina and I have learned the hard way what you actually need. Here is a list of items I was either thankful to have or wish to God I would have had.
Water-one gallon per person per day, shoot for at least two week's worth.
Gasoline-When tragedy strikes, I have learned that gas can be ridiculously hard to get. No point in having a generator if you have nothing to put in it. Also if you are ever in an area where martial law is enacted, goverment will take control of all the gas stations; yes in America.
Non-perishable food-Keep in mind, you will be lucky to have a cooking source and that will be at your own doing, so this should be food that you can eat cold and out of the package. I would recommend a variety of at least a week's worth of food, try to cover all your food groups.
An Alternative Cooking Source-Charcoal grill, little propane stove top. This can be especially handy if you are going to have a power outage for more than a day or two, you can cook up out of your freezer for a day or two before they will get spoiled.
Cash-I know it is hard to save money, but keeping a little cash around never hurt things. My bank was unavailable to get money out of for almost a month after Katrina, so I am clear on the use of cash. Credit cards mean nothing when there is no electricity to run them.
Wind up radio-Good to stay in touch with what is going on. Also nice to have something that doesn't need batteries for extended outages.
Alternative LIght Source-Candles, flash lights with batteries or oil lamp with oil. Whatever it may be, try to keep what it needs with it.
Medical Aid Kit- This should be a general first aid kit with a month's supply of your medication. Remember to rotate them out, they do lose effectiveness over time.
Disinfectants-Lysol, bleach, hydrogen perioxide for cleaning minor injuries. Without hot water, bacteria can gather more rapidly and you will need to safeguard your family. Staph infections can run rampant.
Keeping things to entertain your children, board games, cards, be creative you may have a lot of time on your hands with none of our electronic devices. Owning a generator can come in real handy and make your time without power/water more pleasurable.
Just try to keep in mind, when an emergency happens, you may not have the chance to run to the store or bank. I have learned first hand, sometimes you must rely on yourself and your own supplies.