If you are getting married in a church, try to find out if there are other weddings on your day. Get in touch with the other brides and see if you can share decorative florals in the church. It is easy to decorate in whites, so that the flowers will work with everyone. At the reception, plan on a centerpiece that looks like your bridesmaids bouquets. Depending on how many bridesmaids you have, just add a vase and you may save money on many centerpieces.
Food can be beautiful.
On each table you can have a lovely fruit and cheese platter or even dessert cakes. On the head table, have your florist put a little greenery on it and add the bridesmaids bouquets for fabulous frontage. Have an friend deputized to be Comissioner of Marriages for your wedding day. Don't buy an expensive guestbook, instead get some pretty paper, make pack of 3 sheets, punch a hole in the corner and tie with ribbon. Journaling pages can be put on the reception tables with a small note asking your guests to share their thoughts, dreams and advise with the newlyweds.