7. How often do you expect to meet with me prior to the wedding? How many hours do you work on the event day, and what time will you begin and end?

If a communicative back-and-forth rapport is important to you, don't choose a planner who thinks she can pull off the job after three phone calls with you. And if she works for a large company, check whether you'll be working directly with her or if a lower-level employee will be filling in once the major decisions are made.

8. May I see your client and vendor references? Would you mind if I phoned a few of them?

Client references provide insight into how people appraise the planner's service. Equally important is vendor feedback. Vendors are emotionally unattached, and they observe how organized and efficient a planner is. What's more, unlike onetime clients, vendors can compare different planners.

9. How do you charge? Is there a flat rate? Are there add-ons? What exactly do the costs entail?

It's good to know as much as you can about the package at the outset, as each planner has her own billing method. While you're at it, check to see if the quote includes help with the rehearsal dinner and the day-after brunch.