It’s easy to feel good when things are going great. Happiness is easy then. One true act of courage is to feel good when things are going miserably.
When life is throwing you challenges, and you are looking out on a bleak ocean of your life, stop and write down 10 things you appreciate in your life. Consider how much you have. Not to say that what is making you feel the worst is not real, but equally real are the miracles in store. Where are you staring? You have control over that. Take it.