I tried Hypnobirthing as my sister had used it for her DC2 and DC3 very successfully - DN2's birth was 100% pain free! (Both also born at home)
DSis said that the worst DN2s labour got was strong pressure. She then squeezed the palm and back of my hand between her thumb and fingers - apparently that was it! (DN3 wasn't quite as easy, but was in v stressful circs)
I had meant to knuckle down and do a lot of practising in my maternity leave, but DS had other ideas and arrived three days later... Oops! I definitely hadn't prepared properly and didn't experience a pain-free labour in any shape or form, BUT, I still think it helped - DSis had warned me that Hypnobirthing mums will often be further along than the midwife thinks as they are usually calmer/more controlled than others at the same stage. This was true for me.
Also, I found the Hypnobirthing techniques very useful during transition/crowning, they were easier than earlier stages for me.
I should dig out my CDs and books and start practising now!
'Top tip' from DSis, an exercise in understanding mind over body:
Get a jug of cold water and tip a load of ice cubes into it. Put your hand in and see how long you can hold it there (time it).
Take it out, warm up, and take a few minutes to breath deeply. Focus on an object or an image in your mind.
Put your hand back in the ice water, continuing your deep breathing. Most will find they can keep their hand in a lot longer while concentrating on their breathing.