Congrats and best wishes to you and Jeff!
Couple of things I couldn't have done without on my wedding day:
-Concealer: You're gonna be tired from this week. And stressed. YOu don't wanna look it. Concealer works miracles.
-Waterproof mascara: You're probably going to cry at some point. Be ready.
-Comfortable underwear: Yes, it IS your wedding day. But you can change into something fetching and cute before later that night. The last thing you want is something crawly or scratchy inching its way into your netherregions in the middle of the ceremony.
And last but not least...
-Patience: I did really well on my day and didn't snap until we couldn't figure out how to bustle my dress. I snapped...but just a little bit.
Just remember that something WILL go wrong. But it's not the end of the world. It's just part of the memories. We now laugh about the fact that our guests got impatient for us to come back from picture taking and cut a hunk out of both our cakes before we even got to cut them. We were somewhat livid at the time.