As part of my studies as A Student Of Old Age I see that I get energy from clean air and deep breathing, from drinking lots of water and taking cold showers, and from getting enough quaity sleep (need to do some work on this).
Next on the list (see here) is energy and we get most of it from food. A huge subject, isn't it. I eat a pretty healthy diet and a craving for sugar is the only thing that can be a problem for me I would say. However, I am focussing on filling up with the good stuff before even thinking of the not-so-good, which works quite well for me as I really do like good food! I am increasing my intake of fruits and vegetables, and buying the best quality I can afford.
What works for you? Do you notice your energy levels vary when you eat a certain way?