Many of us are empathic. We feel the plight of others as if it is our own. If you are depressed or feeling discouraged for no seeming reason, you may be tapping into the issues of others.
The good news is that by letting the feelings pass or just waiting them out without reacting, you could be helping uplift others.
Technique: So when you feel bad or depressed, imagine it being like a cloud of something just passing through. Visualize helping it pass through you into a river of Light and dissolving. Better yet, visualize the river of Light passing through you and cleansing you of everything but Love and Light.
The more you do this, the stronger you can become. You may want to ask when is it ever your own stuff. It is never your own because you are pure love at the core.