What season are you in?
Things can be dark and cold at times but after this the sun comes out. Know what season you are in so that you can prepare for the next one. Do not make things worse than they are and do not make things better than they are. You must be equally prepared for each season.
When things are good, enjoy them. When things are bad, reflect on it. There are two extremes that you will bounce between and each one can be learning opportunity for the next time you are in that season.