Dream Interpretation
I first read Freud's Interpretation of Dreams (published over 100 years ago) as an undergraduate, which heavily influenced my decision to become a psychotherapist. To date, the book has remained the gold standard for dream analysis. Dream interpretation has always been a prominent part of psychoanalytic and psychodynamic therapy. I highly encourage anyone interested in learning about their dreams to read it.
Dreams provide rich inter-psychic material and reveal parts of you that are hidden from conscious awareness. Understanding your dreams may help to uncover buried emotions for people who find it difficult to talk about their feelings. I have seen in my clinical practice that clients engaged in dream analysis benefit far more than those who don't.
I suggest creating a "dream journal" and writing down your dreams first thing in the morning while you can still remember them. When recording your dreams be mindful of any symbolism, which can help identify various themes in your life. As a bonus, journaling is a great way to establish better self-care. Dreams have manifest content, which is the information from your dream that you can tell your therapist (i.e., what happened in the dream), and latent content, which is the hidden meaning of your dream.
In psychoanalysis, dreams represent desires or conflicts you might face and any wishes you want to fulfill unconsciously. Further, dreams often hide or repress unwanted desires or emotions you might have.
As Freud most famously said when referring to dreams as "The royal road to the Unconscious." Dream interpretation is not a science but more of an art. The meaning that you associate with the dream is often the most important in psychoanalysis.