I think that energy management and the power to use your own energy is among the most crucial keys to effectiveness. Although our power to organize our time is limited to the number of hours in the day, our elemental potential for bettering energy has far fewer physical limitations. Being able to better your energy capability and your power to use that energy effectively will have a big affect on your results.
To help out with this I've listed ways you are able to either better your energy capacity or better control the energy you already have. I've tried to provide advice that covers all 4 properties of human energy in physical, emotional, mental and spiritual arenas. I've personally tried all of these strategies and I've discovered them to be incredibly effective in bettering my own energy.