Clams are currency are required to purchase most items in your house. They can be earned efficiently through the following methods. When your characters are idle, have them perform short actions repeatedly. You can get more Clams and experience than from longer actions. When about to close the game, make sure that all characters are assigned to the longest possible tasks. Build workers in the city. Do this by getting them from the Shop. Complete quests to get various rewards, including Clams. Add more neighbors and visit their Bedrocks to get extra Clams. Collect stone every few hours. You will get 500 stone each time, and is better than sending Fred to work there. You can instead use Fred interactions and earning Clams.