My second tip is be prepared. Most shops offer an incentive to buy the first day, and sometimes that can pay for the cost of a veil! If you love the dress and you can't imagine yourself in anything else, then don't be afraid to pull the trigger. You're wedding gown shopping to find a beautiful dress, and every store is full of them, so don't be surprised if you buy the first day.
You didn't have to date every man in America to know your Fiance was the one.. the same applies to your wedding gown.
Photos courtesy of 20th century fox