I focus on these things and hope outages etc. don't last more than a few days. Nothing special, no extreme purchases, nothing that requires cooking, but a box in the spare room with -
Heavy duty charger, the one I have will do an iPad and a phone to full.
Battery/solar radio and torch.
Tinned foods like tuna, salmon, corned beef. Ryvita and crackers galore
Soya and almond milk which lasts for ages unrefrigerated. I have UHT aswell but I hate that stuff, but any port in a storm.
Four toilet rolls
A spare month's medication which I got privately. That's so reassuring as I would be half dead without it!
£100 cash.
That's my emergency box, and I know where it is, and then forget about it.
Things to remember though -
Charge up power banks once a month with reminder
Check use by dates on meds
But there's only me here so it's easy enough to be prepared and I'm not fussy about food as long as it's edible.