Harvest moon tree of tranquility - how do you get more energy?

Answer 1

You can either eat food (crops, foraged food, cooked meals, or grilled fish) or you can buy energy pills from Meringue Clinic.

Of you want more energy as in a bigger energy bar, you can eat power berries! Just walk towards the sparkles in all these places and press A. There is one on the 30th floor of the Ganache Mine, on the mini-island in the Goddess Spring, when you first cast your level 3 fishing pole, when you till 1000 squares with your hoe, and right after you raise one of you animals to 10 hearts for the first time.