I don't think there are any methods that work unless your body is near ready to go anyway. But you may as well try everything vigourously for the best chance! Walking, sex, sweeps, and allegedly pineapple and curries. Is there a pineapple curry available? I'm sure there'd be a market for it amongst pregnant women.
If you want to put off the induction for a bit, then get them to monitor you everyday to prove the baby is alright and the placenta is still working. This should also show whether you are getting contractions and if they are progressing. Thats what I'm doing at the moment. (so no, I can't personally vouch for any of the above methods working yet!).