Again, there are two schools of thought... Actually three.

School A) Babies inately know the right way to be, at the right time - leave them to it.

School B) It doesn't hurt to encourage bubs into a good posistion gently

School C) They're the WRONG WAY AROUND intervene intervene!!

Most of the time I believe firmly in school A. Babies do know what they're doing, and provided you're relatively active in pregnancy, and don't spend too much time lounging about supinely, they'll generally find their way.
Mine did :)

However....A ociput posterior labour can be longer, a little trickier, and more painful than an optimally positoned ociput anterior labour...

So there are a few hints that can gently encourage your bubby around.

Firstly crawling. Apart from being lovely and relieving on the back, it's great for getting bub to turn the right way.

Secondly, maintaining good posture throughout the day, not leaning back, not putting your feet up.

Thirdly rebozo massage there are several books, websites and videos on the techniques available. I found this particularly useful, and soothing.

Of course, it's wise to discuss anything you plan on doing with your midwife first. They will probably have a list of other ideas and techniques, ranging from homeopathy, to accupuncture.

hehe
on your advice, I spent a great deal if time upside down, crawling, and talking sternly to
oliver from about 36 weeks.Easy labour and birth, so well worth the effort...

my knees still look bruised though!!