Watch Your Step

Granted, you'll want to wait until your photographer gets fab shots of those Jimmy Choos before doing this...

BUT once it's been captured on film; scuff the soles of new shoes with sandpaper to create traction, preventing embarrassing tumbles when walking down the aisle to soon-to-be-hubby or dancing with the girls at your reception celebrating your new title!

Venues - "To Book or Not To Book!"

Once you've researched all the venues you want to visit, mapped it all out and made the appointments to visit them, arrive earlier than expected... Why? To speak to the staff walking around, interact with others in the space to see whether you get a better insight to how well things are run and how happy everyone is there. Then ask them something unrelated to the space, like "Do you know a great place to eat around here?". If their response is positive, they treat you well and appear happy to help, chances are your guests will have the same experience!
(Siting through their sales pitch just isn't the same!)