How soon should I book a minister?

I would suggest you book a minister as soon as you have a date and time for your ceremony. Many professional ministers book up on popular days. Be wary of ministers that are inexperienced. The minister is an important part of your wedding ceremony and the best professional ministers can make your day.
Some important questions to ask:
Do you have an office?
Do you work out of your home?
Do you have a staff?
Will you send my license in for recording?
How long have you been a professional minister?
Is this your full time profession?
Can I meet with you before the wedding?
Do you issue marriage licenses?
Do you have references?