Getting labor started

I'm 33 weeks so obviously it's not time yet but how many mommies are going to try to naturally get themselves into labor? Friends of mine have recommended that I start drinking the red raspberry leaf tea in about 4 weeks. They've also mentioned evening primrose oil capsules starting like next week to help start thinning out my cervix. No bashing please. I know it's not time to have my baby yet. Even if he is measuring 3 weeks ahead of what he should be, it's still too early