Items (Harvest Moon: 2 GBC)

Getting money is, obviously, very important. You need it to buy more seeds, upgrade your farm, buy animals, and so on and so forth.

Mountain Foraging
The easiest method of getting money, though it doesn't get close to yielding as much as anything else.
 * Spring - Berry - 150G ea.
 * Summer - Cherry - 150G ea.
 * Fall - Mushroom - 180G ea.

Fishing
One of the first things you'll want to do is buy a fishing pole from Bill. After you do this you can make much larger amounts of money consistently by fishing in the river on your farm.
 * Tiny fish - 40G ea.
 * Regular fish - 80G ea.
 * Big fish - 100G ea.

Farming
The most obvious choice for earning money. Just till the land, plant the seeds, water them, and watch 'em grow. However, the different genders do get different kinds of seeds.