Based on the assembly on 30 July, you can find links here to the practice of keeping a gratitude journal. The links you can try are:
https://blog.mindvalley.com/gratitude-journal/ or also
These links are just two suggestions.
You may of course look for others. The important aspect of the assembly was that gratitude, a very Christian notion, can have amazing consequences when it comes to improving your life. The benefits are many.