I always tell people that it is important to keep all your old RAW files (not just your edited images) in case you want to go back and re-edit. After my awesome SIL pinned one of my photos of her wedding from 2007 on pinterest I realized that it is time to take my own advice and go back and re-edit her photos.
My 2007 edit
and a quick edit now
It's amazing how much differently I look at an image now, and how I approach editing it. I also know a lot more about how to edit now. Now to go back and edit the rest! Anyone else want to go back to an old photo and try a re-edit? If you do post a link in the comments.