Im the same as fly, everything the day before or else I cant sleep, it is very seldom I would have to change something because of doing it too early, the only thing that comes to mind is a corsage with white roses looked like someone sat on it the next day. I find the reception can be tricky though because I like to go after Ive delivered the brides flowers because then the tables are set up so if there is pedestals to do, which i always do in situ, then time can be a factor, in which case I go twice. If Ive done pedestals in a church the night before then I have to go and check they are okay on the wedding day even though they are always fine, you never know what might happen in a church overnight