No regrets!
1. Hire good vendors that you can completely trust.
2. Hire a DOC so you don't have to worry about anything and give everybody her number.
3. If anything goes wrong don't even think about it.
4. Take some moments alone with FI during the day and try to pause and enjoy the moment.
5. Schedule plenty of time scheduled for pics. Even if you like the photojournalist approach, don't forget to have a list of must haves or you will be dissappointed later that you didn't get some obvious pictures.
6. Day passes by soooo fast so hire a videographer.
7. Have backup plans in case of weather not cooperating. If it's an outside wedding I would get a tent. If you wanted outside pictures rent cute umbrellas (if the forecast shows rain).