At the start of the game, enter the first house. Go down the rope and enter the door. Talk to the old women on the right, she will give you a chest of 5 lifedrops. DO NOT OPEN THE CHEST. Instead, keep talking to her for at least 20 times. She will now dropped 20 chest, 100 lifedrops. Open them all to max out your blue hearts. Once you open one of her chests, you can no longer get anymore by talking to her.