If you have a regular exercise routine, try to mix it up a bit today. Mundane physical exertion will do more to hinder your energy levels than to improve them. If you don't have any sort of regular physical routine, today you definitely need to start one. Even if it's something small -- such as taking a walk at lunchtime, or walking up a couple of flights of stairs instead of taking the elevator -- it will make a big difference in your energy level and in your attitude today.
