VBAC?!

ANY SUGGESTIONS ON HOW TO HAVE A SUCCESSFUL VBAC?! I finally "talked" my doc into letting me try for VBAC but she says only if I go into labor on my own. She checked for dilation, said I wasn't dilated any still but supper supper soft. I'm 37 weeks today. She kept my date with labor and delievery for scheduled csection, but says if my body goes into labor before then and no complications I can have natural