For Hypnobirthing to work, you just have to BELIEVE it is going to work, and PRACTISE the relaxation exercises so that they become second nature.
For those who don't know how it is supposed to work, Hypnobirthing philosophy believes that childbirth is usually more painful than it should be because we are TENSE and TERRIFIED of pain. With my first baby, I remember tensing and bracing myself for a contraction, thinking "oh no, here comes another one". Whereas a contraction is supposed to help the cervix dilate and ease the baby downwards, if we are tense then the contractions are pushing against an obstacle, and that's what causes most of the pain, and/or many common medical interventions such as inductions, forceps or caesareans - yes, Hypnobirthing claims to reduce the chance of all of those being needed.
By listening to the CDs (one is a relaxation CD, one is positive affirmations) daily for several weeks, we can reprogramme our minds to relax more easily and have a more positive mindset about labour. If you are relaxed and have nothing to fear, it will definitely be an easier experience than otherwise. The breathing technique is also excellent.
I did listen to the CDs daily, but still I didn't find it easy to relax. I'm quite a tense person normally. Some people using Hypno manage to sleep through most of their labour, but I wasn't that lucky! Even still, my labour was a breeze, and the midwives at QMH couldn't believe I was in labour until about half an hour before the baby appeared, which was great because the medical staff left us alone!
Up to the last hour (8cm?) I was still talking and walking between contractions. I stayed relaxed by listening to relaxing music and letting my husband do all the talking/negotiations with the hospital staff. I also used the EpiNo which helped me to have tremendous confidence that the last stage would not be painful, which it wasn't.
You can order books and CDs online, but they save the best CD for course participants (although I'm sure you can get it on Ebay!) and it's great to have the support and encouragement of Louise, who is great at dispelling skepticism and self-doubt.