I've heard getting down on all fours is good to try to get baby into anterior position.
Ditto. Basically, any position where you're leaning forward, so gravity is encouraging bub to turn around. Their spine is supposedly the heaviest part, so it tends to move to the bottom. If you're reclined back in a chair, the "bottom" is towards your spine. If you're leaning forward, the "bottom" is towards your belly...