I am creating a signup process for a paid-for service and am looking for best practices. I've found the following web resources but would like to understand the design patterns in a more structured manner. Can anyone recommend better reference material?
http://patterntap.com/tap/collection/forms
http://www.smileycat.com/design_elements/registration_forms/index.php?page=1
http://www.smashingmagazine.com/2008/07/04/web-form-design-patterns-sign-up-forms/
Thanks!