This is the form that I use in the initial meeting with clients. Initially, they usually just want a price; so I'll shortcut a lot to get to that. But at some point we need to circle back and gather all this information.
It's convenient to have this here so even if I only have my phone I can pull it up and ask the questions. In that case I'll just jot the details on a piece of paper.
Husband
Name/Address
Phone/Email
Wife
Name/Address
Phone/Email
The Ceremony
Date/Time
Rehearsal?
Religious background
Type? (Elopement/Renewal/Civil/Traditional) (Sand/Handfast/Candle/Tree)
Length?
# of Guests?
Theme (colors?)
Specific Readings? Quotes? Passages?
Specific Cultural Traditions?
Dress Code? Suits or Sandals?
Vendors
Venue
Photographer
Caterer
DJ
Makeup/Hair
Baker
Rentals (Chairs, Arch)
Personal Info
How did you meet? When/where?
Stories
Family Member participation
Vows (writing your own?)
Need to see your IDs (required to sign the license)
Deposit?
Contract?