Dreams have been a subject of study for a long time (the earliest known dream study was conducted in 4000 B.C), which should come as no surprise. After all, a third of human life is spent sleeping.
The study of dreams can teach us many things. The state of dreaming can arguably be viewed as the ultimate form of meditation. Dreams bring our subconscious mind to the forefront, and can convey information about your health, relationships, and other matters.
You can train your subconscious to remember dreams by focusing on trying to remember them when you awake. If you do this consistently, your subconscious will assign a higher level of conscious attention to your dreams.You can also try journaling your dreams, or using mental technique before you go to sleep, such as telling yourself, "Tomorrow morning when I wake up I will remember all my dreams."