1. Click the "Contacts" tab
  2. Click the "New Button"
  3. Select the record type ("Household" or "Organization")
  4. Click the "Continue" button
  5. Enter in all available Information (Last name is the only required field, but you should enter as much as you can)
  6. Click the "Continue" button
  7. Review & enter any additional information
  8. Click "Save"
Note that if you are running into trouble finding the tab in step 1, see this article.