We went in 2008 and I got ours from penny collector. It's a pretty comprehensive list and I just printed off where I knew we would go (i.e.: hotels & parks) as they are listed individually. I knew we wouldn't get to the All Star or POP resorts or the waterparks so I didn't print those, but as we found the machines I crossed it off our list. I also let my daughter look at it ahead of time to see the ones she wanted the most. That way it saved time in the parks. I carried a backpack when we were at the parks to keep autograph and penny press books, camera and iteneraries/reservation numbers in and just added that days sheet to the bag. I would swap it out when getting ready for dinner if at a different location and every night we would cross the ones we got off the list.
You can get penny press and autograph books at any shop on property.
The lists aren't perfect and some were moved or replaced with different machines, but you still get a good idea. All the employees at each of the stores know where they are in their shop so that's a good resource too.
Happy pressing!