You need some jobs for your characters, but you don't which one ? In such cases you need lists of possible labors. Here is an example of a list. ( And I can assure you it helps you a lot ) SIMPLY WRITING TIP #9
Robinson Crusoe by Daniel Defoe is a fictional autobiography of a castaway who spends 28 years on a remote tropical island near Trinidad, encountering cannibals, captives, and mutineers before being rescued.