Fitball - I bounced on it in the shower, with one shower head on my tummy and the other on my back. It was great.

Oils - I went to a store (Perfect Potion - pretty sure they are online) and got some oils - one blend was a 'relax' blend, and another was a 'refresh' blend. I also got a in-labour oil to rub on my belly - that one contained clary sage and it definitely brought on the contractions (it was amazing how well it worked).