Players are able to accept certain job classes in the game to earn rupies. You may have up to 2 jobs at once, but if you quit one job to accept a different type you lose your experience level in that class. Job types are: Miner, Digger, Hunter, Farmer, Weaponsmith, Builder, Woodcutter and Fisherman. The payouts earned increase exponentially depending on your skill level in that class. Choose wisely, some are more profitable than others.
For a full list of commands type: /jobs