Go to BJs.com:
- Mouse-over the "Sign in" icon at the top right side of the homepage
- From the pull-down menu that appears, click on "Account Information"
- Click on the "Create a login" button (under the "First time to our website?" banner)
- Enter your Membership number (11 digits, with no dashes or spaces*) as well as your first name, last name and ZIP code
- Click "Continue"
- Complete the required fields
*If the Membership number on your card only has nine or ten digits, just add one or two zeroes to the beginning to make it 11 digits.