Currently, there is no standard method to ensure the survivability of digital data for the long-term. What follows is a summary of suggestions and best practices that members of the DLI staff have compiled from readings, listserv postings, and hands-on experiences. Try not to let cost be an issue when it comes to long-term access to your material.
Quality is important.
Use 650 MB disks and only record up to 630 MB per disk. Choose disks with a top surface meant to be written on and use a felt tip pen to do it - damage can occur when pressing too hard with a ball point pen to label the disk. Record as much information on a CD-R at one time. Avoid recording in multi-sessions if possible. Record using format level ISO 9660.