Plow your ranch alot to get one berry.
Plow some more and you will get another.
Chop a lot of trees in the mountain and you will eventually get one.
Break the chicken statue with a hammer, and you might find a berry.
Do well in the Egg Hunt festival.
After the earthquake in Winter, chop the tree stump by the pond and fall in the hole.
Get a fish, and throw it back into the pond.
Sell a chicken in the Fall, and give it to the Hawker.
At the harvest festival, bring a fish or moon flower as your food. This works out well with the moon flower because it is one of the few days that it is actually growing!