Some disaster has befallen society: you have to secure a month of food for you and three other people. How do you do it?

Let's assume no zombies or other supernatural occurrences, but could be plenty of people being shitty, consequences thereof, or natural disasters

Edit: to expand on this, presumably if society has temporarily or permanently collapsed there would be issues with things like deliveries, security, digital transactions, utility service etc. Feel free to use whichever scenario seems most likely to you, I'm asking more because I was thinking how screwed I'd be if I was just out of food after say, seven days.