An interesting experimental study has been devised to determine how presleep experiences affect the dreams of the subject. Several types of presleep experiences were employed on different subjects, such as viewing exciting films and neutral films and having suggestive sessions prior to the subject's falling asleep. The hypnagogic reveries prior to falling asleep were also studied and evaluated to demonstrate how the day residue gradually entered the dream material. The results clearly demonstrate that elements from the presleep events can definitely be identified in subsequent dreams. The experiments offer validation of the relation between the waking experience and dreams. The procedure may also be useful in shedding light on dream recall and forgetting, and indicate how certain elements are transformed into dreams in accordance with the history and conflicts of the subject. The method may therefore be useful in exploring the relationship of the 'style of dreaming' and differences in personality.