Cut out the shape you desire from green flannel: the doll could be a person, an elephant, a leprechaun, mermaid, or whatever you envision.
Stuff it with dillweed and Irish moss, then sew it up and embellish it as desired.
Talk to the doll; tell it your troubles and request advice before you go to sleep. Pay attention to your dreams.
Source: Encyclopedia of 5,000 Spells