Happiness is as much something you choose based on how you direct your attention and perceive the world around you as much as it is something that you receive as a result of what's happening to you.
http://yourmeaninginlife.com/blog/dont-find-happinesschoose-happiness
You can always find a reason to complain, and you can always find a reason to be grateful. The former will lead to a miserable life; the latter will lead to a more pleasant life.
https://yourmeaninginlife.com/blog/it-will-always-be-something
There are many misconceptions about how important growth is to your life, from what kinds of growth are possible, whose growth is meaningful, and how growth is meaningful even in the face of endings and death.
https://yourmeaninginlife.com/blog/misconceptions-about-growth-oriented-meaning