For our 2nd birth, DH and I took a Hypnobabies class and did our daily 30 minutes at home. While I didn't use it as fully as I could have during the birthing time (I didn't want DH to think it wasn't hurting so I had to be a bit dramatic ;), I still loved the outcome it gave me. Not to mention how much it helped with sleep and stress-relief prenatally! We're going to use it again but I'm not sure when or how we'll start. I don't know if we need to do the full-on program or if me using the CD scripts from like 36 weeks on will be sufficient.
I'd love to hear from someone else who's used some sort of Hypno birthing technique with a previous birth and is planning to use it again. When will you start preparing? Will you take a class or just use your materials from last time? Will you do anything differently?