I put in mind that whatever problems or worries I am having right now, it will pass. It will not be permanent. There will be sunshine after the rain. 
Be thankful actively. Being grateful is not just a feeling, but an action. Be grateful to change the perspective instantaneously and the more we are grateful, the benefits will be greater.In addition, thankful also makes us feel more positive, improve our relationship with others, cultivate love, and add happiness.