Increasing amniotic fluid

I went for an ultrasound yesterday, and my ambiotic fluid levels were on the low side of normal. I have to go back in two days for another ultrasound, and I'm nervous if my levels are still low I will have to go to the hospital for iv fluid or possibly to deliver. I'm almost 36 weeks. 
Any tips (besides drinking tons of water) on how to increase my amniotic fluid level?