A checklist for game designers:

Full checklist: http://cardboardedison.com/s/Ludology-Game-Design-Checklist.pdf

Part 1: http://ludology.libsyn.com/ludology-epiosde-123-check-up

Part 2: http://ludology.libsyn.com/ludology-episode-124-checking-it-twice

Part 3: http://ludology.libsyn.com/ludology-episode-125-checking-out