The sleeve should be the place that anyone who digs your music can find out information about how to contact people vital to your career. Include the name, phone number and e-mail addresses for your publishing company, record label, manager or attorney. You should always include your band’s web site and email addresses with an easy link for signing up for your mailing list. Don’t clutter the sleeve up with inside jokes and special thanks to all of your friends – busy professionals like music supervisors and festival bookers want easily accessible contact information.