my last two girls were OP right up until birth but then turned during labour (DD2 was right at the beginning of the first real hard part of labour) and DD3...have no idea but she came out the right way lol. transition with her was much longer though so I am thinking it was then that she was doing all her turning.

the best thing to avoid with an OP baby is to have your waters broken by your care-providers. baby needs that fluid to help them move into a good position for birth.