Your experiences are a wealth of knowledge and wisdom. You may not always see this at the time you are going through the experience. Reflecting on experience at a later date can show the effect experiences had on your life and gives you the opportunity to learn from those experiences.
Record your experiences in your journal and flag them for review. For some experiences you might want to flag for review in a month, others you might flag for review in a year or in 10 years depending on how difficult they were.
Reflecting on those experiences gives you the opportunity to grow.