BACKHOME Hostel: a standard Vietnamese hostel. Good food for not much money and very helpful staff that know the area well. Most of what we did was recommended to us by them. Like Nha Trang, Hoi An is quite tourist-y, but in a different way. The river running through the centre of the town has beautiful lights along its banks, with old footbridges crossing it. The streets are all small and cosy, with lanterns hanging from above.
The Cham Islands: we went snorkelling around some coral reefs one day, which was brilliant. They picked us up, took us over on the ferry, then directed us to the best places to snorkel. There was the option to learn to scuba dive instead, for a higher fee, but for me the snorkel was enough. They even had prescription goggles available to fix my short-sightedness. Just like with other tours we did, we were also taken to a different island later on and given a full meal by the beach before being taken back to the ferry and then the hostel.
Tailoring: Hoi An is famous for its tailoring of all kinds, so we took full advantage. As we were motorbiking around the country we thought leather jackets would be appropriate (also useful back at home where it's a lot colder). The hostel recommended a good place, we went there with some designs in mind (I'd found one online and asked for some alterations e.g. different collar, sleeves, pockets), then they let us pick the leather and measured us up. It was 3 million VND up front and then another 3 million when they were finished, only 24 hours later! The total was about $220, which is excellent for made-to-fit high quality leather jackets.
I can't remember specifics, but I enjoyed it because there was a lot of seafood (it is coastal).