Using seasonal flowers for your bouquets and centerpieces can save you a lot of money in decorations. Plan ahead with your florist to be sure that enough flowers will be available.
Keep a binder or folder with images and ideas. This can be a physical binder or an online folder.
Make a list of everything you will need to bring with you on the big day. Gather everything in advance and put it in one spot so that you don't have to search for an essential item at the last minute.