This forum is all the cheats book you will need. Ask any question and there are lots of people who are glad to help you out.

Have you used the tutorial that runs when you start a new game? It tells you how to get villagers to do a task (such are farming or fishing). If the villager is stubborn and doesn't want to do it, just keep putting them back there. Once they gain a little bit of skill (you can check this in the details screen) they will start to do the task on their own.

Also, remember that some tasks (such as farming and fishing) are only available after you get tech upgrades. Takes a little patience, but that is what makes this a fun game!