What items would you include in a home survival/emergency kit?

Yesterday Christchurch (NZ) experienced a significant earthquake . Uncannily, earlier this week I had been thinking I should prepare a survival/emergency kit to have at the ready in the event of some kind of disaster. Although not personally effected by the earthquake it certainly provides a very strong incentive to prepare the kit and not allow the idea to simply sit on the backburner of my mind. I thought of a number of items including a small battery-operated transistor radio, a good supply of batteries, candles and matches. What other items would you include?