With DD1 I did nothing at all. With DD2 I took EPO from 37wk, walked miles a day, and coerced DH into daily nookie starting at 39wks. This time I'm either 38+6 or 39+6, depending who you ask...I've been EPO-ing since about 36.5wks, walking miles/exercising, and forcing DH to DTD at least daily for the last few days.
I'm noticing I am getting antsier each pregnancy. DH doesn't seems to mind though, lol.
I would consider other things once I get past 41w and some odd days, to avoid an induction battle at my Dr's office.