Are you having a photobooth at your wedding? Then have it do double duty!
Have guests take extra shots and then glue (with a gluestick) them into a photobook or scrapbook, then have lots of sharpies on hand for them to write their notes and well wishes to you beside or underneath their photos!
Add props to photos for added fun!
Image: hawaiianphotobooth.com
Image: brideonbudget.blogspot.com