Photojojo has an excellent application called “Photo Time Capsule”. Twice a month it’ll send you some interesting shots from your flickr photostream that you uploaded about a year back. It’s fun to be reminded of stuff you shot earlier… Once you get the capsule, you can leave yourself a message that you’ll get back next year.
I’ve been using it for some time now and it’s great to see some old pics I had forgotten all about 🙂
Here’s the link – Photojojo’s PhotoTimeCapsule