You did it! You got married. Can you believe it? No, not that you're still married. Can you believe how much money you blew on things you probably (in hindsight) didn't need for your wedding?
Oh, and then there's the photographer(s) who are either paid by the hour or for the day. You only really need them for the important moments, and as the wedding reception wears on there are less and less of those. Plus those family portraits (with all the cousins) take forever.
...or decreased the number of cocktail hour appetizers (how many pulled-pork sliders and chicken satays do you really need for 60 minutes?) and put that money back into the booze budget.