http://help.samsclub.com/app/answers/detail/a_id/2042/~/free-annual-membership-for-new-moms -Moms with kids ages 2 and under can get a free Sam’s Club year membership by calling 888-746-7726.
Update – you can now get it online by messaging them on Facebook:
https://www.facebook.com/samsclub/posts/10153682415757682 – “Please send us a private message with your mailing address, phone number and email address and we will get a special mailer sent to you by October 15th. You can take that mailer into your local Sam’s Club and they will get you setup with a free, one year membership. “