Chalkboards are extremely trendy right now! To give your guests something sweet to read, display a relationship timeline chalkboard. If you want to make your own chalkboard, you can purchase chalkboard paint at a majority of craft stores.
wedding journals - question ideas from comments: -What should we do on date night? -Whats the secret to a happy marriage? -What do you hope for our future? -What's your funniest memory of us? -What should we name our kids?
Put together a mismatched collection of frames to hold old photos for a wedding table. - it'd be cool to put our parents' and grandparents' wedding photos and old pictures of ourselves in a display like this
"Stones and Rocks DIY Wedding guest book". Guests write messages to bride and groom on rocks with Sharpie instead of signing traditional guest book. This would be cool to put in giant glass vases on either side of the fireplace once the wedding was over.