aromatherapy

Aromatherapy is a great resource for labor!  Most doulas will have massage oils with essential oils in them, but you might want to look into what scents you prefer and what feels most relaxing to you.

A great basic recipe for massage oil during labor:

Ten drops of clary sage, five drops of rose, five drops of ylang-ylang mixed in 2 fl oz (10 tsp) of sweet almond oil.

Look a little more into aromatherapy here:
http://www.birthsource.com/scripts/article.asp?articleid=45