You're right, we need to think about all the good things in our life, especially when we are stressed over something.
The joy and loves of our lives can't ever be replaced, and never forgotten, where as some of the things we've stressed over often (not always) disappear from our memory.
My joy is my family and the love that we share. Without them and all the memories we've made, some good, some not so good, my life would be very different.