Many stay-at-home parents have found temporary employment as a solution to some of their concerns about leaving the workforce. Temporary work can serve many purposes including keeping your skills sharp, keeping yourself marketable by avoiding a gap in your resume, and supplementing your income.
If you have young children you might be able to work a temp job by trading babysitting with another parent, or doing it over the summer when you can hire a high school or college student to babysit. If your kids are in school, you could take a temp job during the school year.
If you have left a professional career, the challenge is finding the right kind of opportunities. You might be able to uncover some opportunities through networking with former colleagues. But, if you go to a traditional temp agency, you might only be able to find temp jobs that pay minimum wage and require you to spend hours filing or typing up someone else's work.
But now it might be a little easier to find a professional temporary opporutnity. New companies are springing up around the country that target moms specifically, read about some of them in this recent CNN article.