A gratitude jar is a simple tool used to cultivate a mindset of appreciation. It involves placing a jar in a visible location and filling it with notes that express things you are thankful for. Each note can be written on a small piece of paper and added to the jar regularly, creating a collection of positive moments and experiences. At the end of a designated period, such as a month or year, you can review the notes to reflect on the good things in your life. This practice can enhance emotional well-being and promote a more positive outlook, making it a popular activity for individuals and families alike.