I’d just do your best to keep extra of stuff you know you’ll eat, you know the old two is one and one is none.

Grab 2 packs of dried pasta instead of 1 for example. Rice. Beans. Canned stuff like veggies, fish, even the little single serve veg/beans etc.

Anything is better than nothing which is where most people land. Even knowing you got enough food stuffs for a day is enough comfort to ward off panic in disaster situations.

A 24/30pk of 500ml water can be had for like $5/10. Also very useful outside of disaster if they’re cycled through.