The earth is a wreck. War, famine, plague, etc. have ravaged humanity and ended civilisation as we know it. There's no electricity, the water system is gone, and there may be bandits stalking the land.
You have managed to band together with a small group of hardy fellow, desperate survivors.
Besides being another mouth to feed, how will you make yourself useful to the group?
What's something useful and important you think that you could create or build or collaborate with others to make for your group of survivors, something that might help you all?