I feel like in recent years, the groom's role has diminished in the wedding planning process. The groom is supposed to choose the engagement ring but many women show pictures and drop hints about their dream ring. The groom is to choose his wedding party, but if your bride doesn't like one or more of your friends, good luck getting them in. And you're supposed to choose the groom and groomsmen's attire. It is your day too! One day you'll be telling your kids or grandkids about the day you married your wife. Make sure that it has your stamp on it.
It occurs to me that many brides have a hard time letting go because we don't always feel that the day means as much to you as it does it us. If you can make her feel that your wedding day is important to you as well you'll have a much happier bride and a better wedding planning experience.