muriwai - 1st baby was an induction, had epidural once I reached 7 cm, but up till then had nothing at all (stupid mw didn't believe I was in labour), BUT 2nd baby was totally pain relief free, and born at home, and was over 10lb!!! I firmly believe that the more they interfere with what is basically a normal delivery, the more pain relief you need. So if they start trying to speed things up, you will probably need more pain relief. Obviously, when medical need arises, then intervention is necessary and desirable, but I think if you can get through as naturally as possible, you will find it is less painful.
Good luck - and don't worry about the horror stories - it's a sad but true thing that lots of people had less than perfect experiences, but there are really good midwives and doctors out there - the midwife I had for dd's birth was fantastic, and I have several obs/gynae doctor friends who are very pro natural birth, if possible.
A good birth plan is a really big help - even if you end up deviating completely, it is good to work out what you want before you hit labour, when it can all go out of the window. The only other thing I would suggest is keeping upright as much as possible - I would never have believed it made such a difference, but it really did with dd - I know 2nd births are generally much easier, but I'm sure the being upright helps. And also, walking around. If it's any help, the best position I found was kneeling against the bed, burying face in bed!!!
The other thing you can do at this stage is to try and get the baby into a good position (i.e. an OA or anterior position as opposed to OP or posterior ) - lots of people (me included with ds) have had OP labours, which concentrates itself in the back, and is very painful and drawn out. You need to spend time with your knees lower than your hips, so that baby can rotate into the correct position. Scrubbing the kitchen floor on hands and knees is a good position for the baby. And not slouching on a sofa, because that will put your knees above your hips.
Pupuce and mears are much much better authorities on this, but these are just some things I've gleaned along the way. Hope this helps a bit, and sorry it's so long!