Items required:

scarf (white or cream colors work best)
4 cloves
pinch of basil
pinch of ground sage
lavender or vanilla oil (whatever you find more soothing)
black marker
white ribbon

Lay the scarf out. You will be putting spices into it. Place the spices (ground sage, 4 cloves, basil) into the scarf and add 2 drops of oil. Gather the scarf at the top and tie it with the ribbon. On the outside of the scarf draw the nightmare that plagues you (e.g. spiders, falling).

Place the scarf under your pillow and sleep with it there until you no longer experience nightmares.