Repost from BHB: Past Brides Please Post 'The One Thing I Learned'

I'm a big fan of Martha Stewart Weddings and I love the section called 'One Thing I Learned.'

I know lots of past brides post the lessons they've learned (best part of their wedding, thing they would have done differently, etc) as part of thier review, but it would be great if we could have all these gems together in one thread.

So come on past brides . . .

What's the One Thing You Learned from planning your wedding?

What would you do differently?

What was the best decision you made?

TIA!!!