We need positive energy to enjoy success full life. Some time you lose your positive energy due to some reason like depression, anxiety or unwanted circumstances. It keep you down. All you need positive energy and the best source of positive energy is to spend your time near nature analyze yourself alone and remember your good time.
Meditation is always great to clear out old negative energy due to healing is being done in the process without you realizing about it. This method will heal your negative energy and give you a lot of positive energy. @javybar