This weekend, join Sittercity.com and take 50% off your membership when you use code MOM2012 at checkout. The one-month membership drops from $35 to $17.50, a three-month membership lowers from $70 to $35, and annual membership drops from $140 to $70. Just in time for summer child care, these are the lowest prices we've seen since last July! Whether you offer childcare or are looking for a reliable babysitter, this site provides background checks and references. It also posts senior and pet care providers, nannies, house cleaning services, and tutors. You can try the membership free for 7-days.