The Legend of Zelda: Oracle of Seasons/Heart Pieces

Heart Piece #1

 * Requirements: Ember Seeds
 * Location: Horon Village

Hop down the ledge just south of the mayor's house, go up the steps, and burn down the small tree with an Ember Seed to get your Heart Piece.

Heart Piece #2

 * Requirements: Power Bracelet, Rod of Seasons (Power of Winter)
 * Location: Woods of Winter

Go out the eastern exit of Horon Village (to the Woods of Winter) and then head right one more screen. Hop on top of the stump and change the season to winter. Head up a screen and left a screen, and enter the cave. Inside is a Heart Piece.

Heart Piece #11

 * Requirements: Nothing
 * Location: Maple Spots

Maple will drop one Heart Piece if you hit her. This is completely random, so it may take a while to get.