You are startled by the violence you see in the world, and you need to balance out the shock with predictably soothing activities. Surround yourself with gentleness in your home - create a safe haven. Practice soothing exercises such as yoga, stretching, and walking. Calm your mind with reading positive material and practicing meditation in any way you see fit. Give yourself the balance you need, and notice when you need to balance. Walking is a wonderful exercise for regaining balance.