I took the trouble to copy/paste into a Word document my List of Products Registered from my Club Nintendo Account. You never know when it might come in handy. I have heard of folks using the Club Nintendo records when they lose their 3DS's and whatnot, to help convince Nintendo Service that they should be able to re-download all their stuff. I reccomend this to everyone.
I also copied my List Of Rewards obtained from Club Nintendo, just for fun. Might be handy for comparison purposes if and when Ninty ever gets around to announcing their replacement loyalty program.