Now that spring is officially here, organize a picnic. At some point during the picnic, organize a group photo. Then, at the end of this summer, just before the weather starts to turn into fall, organize an end-of-summer picnic. Again, gather everyone up for a group photo. Frame the photos side by side. And on the first really cold day of the fall, mail off the spring and summer picnic photos to everyone in the group photos.
(The above was a project I first wrote up in the 52 Projects newsletter. I send out the email newsletter about once a month. There’s a sign-up box in the left column if you’re interested in getting the newsletter.)