People talk about heading for the mountains, you are probably better off staying in the lowlands where there are more fishable waters and game. Other that methods mentioned by runningboar, you might take a look at your fishing tackle selection for practicality. You would not necessarily choose the lightest or most sporting fishing tackle in a survival situation. You want something durable and effective.
Fishing is definitely theraputic. It is one thing that kids can do. You can keep the fish alive until you need to use the fish. No refrigeration required.