Our nap time wind down usually is:
-Rock in the chair for about 5-10 minutes (either sing some songs, look at a book, or just talk in a soft voice)
-Go to his room and swaddle
-Walk around the room and turn off the lights and turn on the fan
-Stand by the crib and sway and sing "Twinkle, Twinkle little star"
-Say nighty-night
-Down in the crib he goes...I shield his eyes and rub a little on his chest for about 2-3 minutes
This only works so well for us now because I finally started picking up on his "ready for his nap" cues