I have just joined a new playgroup, my first one ever, with my 3 year old. I didn't know what to expect. So far it's great. My little one gets to get out of the house for a few hours and play with a great group of kids her own age and I get to talk to a few adults during the day! Win, win.
But I realized after the second meeting that after searching for a scrap of paper and crayon to write down my contact info to share with a few other mom's, I needed a play date card. So I put those illustration and design skills to work and came up with a card that I can hand out.

This makes it so much easier than having little scraps of paper all over the place, that I'm totally going to loose!