Other stuff to horde and more...

On survivalist sites there are some very good lists. The US based ones do, it seems, become a little over done when it comes to the subject of weapons. 20000 rounds, six guns and the rest and that's per person. Based here in the UK we're a little more basic. While defence, as an issue, may well raise it's head at some point I'm more inclined at this time to think of stuff like toilet rolls and light bulbs.

With that in mind other than food and water look around your home now and think about what you'd need if it all went to shit. 

• Clothing inc lots of socks and underpants. Unless you have sheep and can knit, sew, darn and make your own clothing stash plenty of good kit
• Toilet tissue and sanitary towels. I'd say 99.9% of the lists I've seen suggest this one and my preference is for the economy kind. If you ran out and had the means to wash cloths then use a cloth. Otherwise stash a good supply.
• Spares!! From light bulbs (given that you have power naturally) and fuses (ditto) to sink plugs - look around your abode and think carefully about what breaks or gets worn out and that you'd have a hell of a time finding afterwards.
• Medical kits, tablets and so on. When the shit comes down your local A&E will be overwhelmed and then fail. We see news reports on occasion now of a lack of blood and plasma. After... nowt. Ditto your local chemist. So read up on what you'd need and stockpile. Be aware that in some products the shelf life is limited. Use the same storage precautions you might for spoil-able food and so chill, keep away from bright light and so on. In the case of some products they are less effective as opposed to not at all. Those of you with very specific medical conditions requiring a high level of care might well be screwed - do what you can. Even a few brushes and combs can be kept as spares.
• Paper! When the shit etc occurs you'll not have emails. Taking a step back and finding yourself using, initially, white boards, paper and even chalk to communicate both inside the refuge and without and you'll appreciate the paper and pens you stashed. 
• Repairs. I'll deal with tools and the like another time but what about putty, filler, nails and screws? Need some glue? Have some stashed?? Your new safe haven does not have to be a palace but keeping it and esp the means to secure it in good nick makes sense right? So stash what you need to keep it that way. 

Look at the photo on this page: do you have spare batteries for the torch? What about filters for the water purification system, more razors for shaving, another few pairs of gloves? That's just one bag. So go look at your refuge kit and add spares!