My most memorable wedding would have to be Lucy and Wills, as i was asked if i would like to stay and watch the ceremony. I jumped at the chance, it truly was a beautiful weddiing!
Having only being married myself recently my top tip would be. During your wedding day take five minutes away from your guests so its just you two together to soak in the joys of the day and being the new Mr and Mrs.
My bouquets are delivered to you in a small about of water in a vase to help them keep fresher for longer. I would recommend that you leave your bouquet in this when not needing your bouquet for photos etc.
After the wedding you could have your bouquet dried or put into resin to keep forever, venue decorations could be given out to guests to take home.