When employing a wedding planner they may suggest a wedding venue that they have liked and have experience of in the past. Be open minded about these suggestions even if you already have a wedding venue in mind. Some venue layouts such as hotels can be hard to visualise prior to the big day and your wedding planner may have photographs from previous weddings so you can see how they will look.
A lot of wedding venues may already come with a Toastmaster or Master of Ceremonies included. If not, your wedding planner will be able to suggest Toastmaster's that they have worked with in the past.
If you are having wedding cars on your big day ensure that they are booked as far in advance as possible or get your wedding planner to do this. Obviously you want everything to be perfect on your wedding day so leaving this until the last minute and finding that the car you want is unavailable is stress that can be avoided by booking early.
Wedding day catering can be expensive so your wedding planner may be able to find you better value for money with research or from their previous wedding experience. Reputable wedding caterers will offer you a sample of your wedding breakfast prior to the event so take this opportunity to ensure that you are happy with the menu.
If you are employing a photographer or videographer on your wedding day ensure that you get quotes from several. Photographers can be expensive so ensure that you know exactly what you are getting for your money. Most offer several packages so make sure that you know how many photographs are included and whether you will have the rights to them.