I've had those feelings before and here is what helps me. Everyday I make a point of being thankful for something or someone. Maybe someone put extra effort i

I've had those feelings before and here is what helps me. Everyday I make a point of being thankful for something or someone. Maybe someone put extra effort in at work, maybe my kids were really well behaved, maybe I really enjoyed dinner, maybe my wife told me a really funny story. Whatever it is, big or small, I try to show my gratitude to people around me and to myself. At first I started by writing them down in a log, then at the end of the week I would look through them. This turned out to be really important to me, seeing the concrete instead of the abstract really changed my outlook.