There are a lot of tips my doula gave me in a VBAC class I took from her last week. There were several positions, and the idea was more to do them in labor so that baby can turn during a contraction, but if you do these things now to get used to the positions and time required, that could help you. My midwife and I were talking about this today and she said to do these near end of pregnancy for 5 min each day for a few days, then 10. So you may need to adapt but work up to it these next few days.
If you get days of prodromal labor, getting induced is NOT the answer. You need to get baby turned, and labor will either progress well from there or stop until your body is ready to really go into labor, which is FINE.
(30 min each)
open knee chest (on spinning babies, butt up in air, chest and head resting on ground)
stairs - walk up with same leg 2 stairs at at time, then go up again with other leg always going up first. Of the two sides, do which feels better.
repeat in labor if baby hasn't turned!
Other things in labor:
curb walk - walk with one leg up on curb, then back with other leg up, do the one that feels better
The key is doing assymetrical movements to turn baby. Again, this may only be the most effective during labor, but do them now and you'll be used to if you need to do them in labor.