For your 72-hour kit, get a battery-powered (or solar) radio. It's so important in an emergency to know what's happening outside your home. I got a great solar powered radio for Christmas that was also a flashlight, a siren, and had a cell phone charger and a USB port. You don't need something that fancy, but we will seriously love having it in an emergency. Radios like this can be pricy - you may pay anywhere from $20-30 (more, for additional features). Long term, however, it's a great investment.
Because the radios cost so much, it's ok to buy less for your 3-month supply, if you need to. Just stay within your budget - add a tube of toothpaste, or some soap. It doesn't have to be much, just something.
We are gathering wheat this month for our longer-term storage. Buy what you can! For more information about wheat, check out our article here.