Searching online is a popular job search strategy these days. You can visit job boards, and also the websites of companies that you are interested in to find opportunities. Through company websites, you can often find information about company benefits and policies that give you some insight on whether or not the company is family friendly.
Indeed.com is a job search site that is fairly unique in that it pulls job postings from other job boards. They recently published some online job search tips that I think are useful, see them here.