Forum OpenACS Q&A: How can i get the user to fill in contact information
View One: Phil's perspective found in
is to initially just get the Name and Email address. Later when the person is more familiar with the community you can ask for more information.
Another reference regarding Usability that I like is Dr. Jakob Nielsen:
View Two: Perhaps you are asking about other fields that you can ask the user to fill in. See the fields in the user_contacts table.
View Three: (Some humor)--- Pay the user to fill in the info or give them something. -Bob