You can head straight to Shriver, you don't have to sign into the office! You HAVE to make an appointment by following these directions: 1) Go to www.donortime.com 2) Click on the "Donate Blood" blutton near the top of the page 3) Search by "Sponsor Code" 963 4) Click on the blood drive hyperlink 5) Choose an appointment time and click on the "Schedule" hyperlink 6) If you are already a Community Blood Center registered donor, click on "Login" in the the "Returning Donor" box 7) If you are a new donor (never registered with CBC), click on "Continue" in the "First Time Donor Box"