Encouraging baby to 'drop'?

I'm 34 weeks pregnant and hoping to have our baby boy here in 3-4 weeks since he's measuring ahead. My son is already head down and facing my back and has been since I was about 21 weeks. I have already started my weekly appointments and last Wednesday when she checked me she said the baby's head is still high. I'd like to encourage him to 'drop' before my next appointment on Thursday. I have been bouncing/doing hip circles on my birthing ball a lot to open my pelvis for him, and I did a lot of walking this past weekend. Does anyone know of any other techniques to help baby drop? *I'm not trying to induce labor, just get him into position! Thanks ladies!