How do you make yourself dream about someone?

Go to sleep with a picture of that person's face in your mind, along with the emotions you feel towards him or her. It may take a couple of nights, but if you are familiar with this person, and spend enough time feeling these things about them, your mind will recognize the emotions that go along with the picture in your mind, and this will eventually trigger your subconscious. Also, you can try writing their name on a piece of paper and placing it under your pillow...this works for some, but you must have a strong conncection to the person in question in order for a name to suffice.