Remember that you are going to want to eat stuff that tastes like the stuff you regularly eat, until you have gotten well past 72 hours and the official announcement of TEOTWAWKI has been running on a loop for a while.
Foil-packed meats (chicken, tuna, and yes SPAM) are good. Non-condensed soups (Progresso, Chunky, etc.) can be heated by regular application of heat, setting out in the sun unopened for an hour or two, or consumed without heating. Triscut/Wheat Thins are nice things to put the foil-packed meats on, as well as to thicken the soups. B&B (the Boston Baked Beans folks) makes a great canned brown bread, if you can find a local store that stocks it.
Forget bullion cubes - too salty. Go with artificially sweetened drink mixes for
some of your water, and try hot coco mix to see if you & the kids like it cold. Get tea bags & a plastic jug you can use to brew sun tea. (I actually like to add a candy lemon drop or two, which melts to sweeten and flavor the tea.) Have instant coffee if you are used to drinking java - buy the best you can find.
Get toilet paper, fark plastic yard bags, and either quicklime or baking soda as well as a dedicated 5-gallon bucket. Lots of toilet paper. Get a seat for it - you will be thanked over and over again except by those who cannot seem to find the balance point. For the latter you might want to consider building a privy box with the seat attached that you can slide the bucket into. If you do, build for supporting twice the max weight you think you might encounter. Double bag.
Bugging in can be more than tolerated if you have activities beyond mere survival for those with you. A crank-type emergency radio will bring you entertainment as well as news, especially if it has short-wave & TV bands. Using playing cards to cut to see who will be barbecued is so much more civilized than drawing straws
and can be used for other entertainment before you get to that point.
Final question - do you know where & how to cut off utilities (gas, water, electricity) to your house? Do you have the tools to do it? (OK, that was 2 questions. Sue me.)
stay safe.