Mine was to let my girls pick their own black dress instead of having them order something. One just had a baby and was in a wedding this weekend and had to pay another $160 for alterations....and I just found out my best friend is pregnant (I'm totally excited!!!) and will be 7.5 months along at my wedding. I am so happy they won't have any stress about a dress or losing/gaining weight. We found the third girl's dress on the clearance rack at the bridal shop for $15, fits perfectly and she's been the same weight for many years.
My other best decision was not to do my wedding at my uncle's house as we originally planned. I would've been so stressed.
What was the best decision you made for your wedding?