I would say one of the best ways is word of mouth, and to that end, have you considered joining a local mothers club? There area couple of really good ones. I was one of the early members of the Pleasant Hill/Walnut Creek Mothers club: http://www.mom4mom.org/ and the Mt. Diablo Mothers Club: http://www.mdmcmom.org/.
There are some great ones around, but by networking with other moms and asking questions, even joining up w/ a playgroup and babysitting coop group, you'll meet lots of other moms in the same situations.
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