I know what it feels like to be depressed. The heaviness in the chest and lack of energy for life, the numbness,the cut off feeling and the feeling of hopelessness and despair.
I know it varies from person to person as do the symptoms but I believe that the following tips will help you when your feeling down.
1) Let yourself feel sensations of depression in your body and let the thoughts come in and be there. I certainly don't mean act on the thoughts but letting them be there will start to ease the situation and resisting it will magnify it.
2) Spend some time in silence and gently ask the sensations and thoughts what they want. Wait and see if an answer comes. I believe the part of you that is depressed needs you to pay attention to it. Doing so will let you start to heal.
3) Allow yourself for a minute to speak as your depression and to be your depression. Give the depression a voice and let it have its say. What does it want? . Usually it will want you o pay attention to it.
4) Picture yourself as a child and stand in front of your child. What kind of things are you saying to yourself? Are you being hard on yourself? Just notice what your saying.
These exercise I believe will let you start a build a relationship with your depression and let it have a say. In time I believe you will start to see the benefit.