The easiest to say, but the most difficult to do, is just to let go. Allow the body, mind, and spirit to release all of the energy that it is holding on to. It can then return to its natural place of balance and harmony. This, however, is not easy for us to do. There are many techniques one can use to release energy that is not in harmony with our highest good.
Amusement is the easiest way to get stagnant energy flowing again.
Look at what is going on around you and find some amusement in it. Enjoy the release you will experience with a good laugh. If that doesn't work, techniques including meditation, any kind of physical exertion, creative expression such as art, and tasks as simple as washing dishes or raking leaves are excellent tools one can employ to release energy. In addition, there are many techniques in which one can be assisted in releasing stagnant energy. Each of these techniques affect the physical emotional, and spiritual bodies, however, one techniques may work better on one specific body than another.