We walked straight out of the train station onto a short boat ride which took us in to the city. (Ayutthaya is surrounded by a moat). We then got pretty lost stepping over fish guts and unknown liquids walking through a food market, and eventually somehow popped out pretty close to our hotel, the PU Guest House (no joke!).
The hotel was very clean, although we stayed on the top floor and the A/C could not keep up with the heat outside - we had it blasting the whole night and it was still pretty sticky in the morning. There was also a fan, but it was one of those fans that rotates in a circular fashion and we couldn't figure out how to get it to blow directly on us.
So, we managed to cover almost everything we wanted to see at a leisurely pace in a day. Next up in the morning was the bus to Sukkhothai.