I've taken petitions around for numerous candidates to get them on a ballot. Some of you may have as well.
If you have, you know the drill. (You pretty much can repeat it in your sleep.)
1) You caution folks that their signature has to be legible (don't sign it like you'd sign for your debit/credit card).
2) You give them the right date to enter (because you don't want, say, signatures dated 2/11/09, then one after those signed 2/10/09, then others following with 2/12/09 -- got's to be chronological order).
3) And, you tell them to write out "Pittsburgh" even though there's not a lot of room.