Well, my policy is do nothing else until I get farming level 3. So now, all my 4 adults are doing research. All the tech points are kept except 6000 for farming level 2. They have no garden, lagoon or beach. Even the first hut isnt completed. Harvest is the only farming thing they do. Once the crops grow back, all the villagers turn to farmers and collect them all as quickly as possible. I believe food is the first one before people can fish, but the last one after that.