Before you go to sleep at night, say your wish aloud three times. If you like, you can write your wish on a piece of paper and put it under your pillow. Ask to have a dream that offers insights or guidance about how you can make your wish come true. Make a suggestion to yourself that you will remember the dream and understand its meaning.
You may have to repeat this several nights in a row, but eventually you'll have a dream that guides you toward fulfilling your objective. Pay attention to details. Who was in it? What was going on? What time of the year was it? What were you wearing? These details often hold clues about when the wish will come true and in what form it will appear.