What is the best way to get more energy?

Exercise. The best way to improve your energy is to exercise regularly, starting slowly, and working your way up to 30-45 minutes a day, nearly every day. Eating a balanced diet is also important, and if this is difficult, at least take a multi-vitamin every single day. Lastly, when we are down, we don't have energy, so do what you can to improve your mood...Enjoy life, go outside, be with friends.
Diet+exercise. A healthy diet and regular exercise alongside good stress management help maintain good energy levels as well as a sense of well being. If energy levels remain low, see your doctor for an evaluation.