Just came back from 10 days in Bali. Have some tips for anyone going there soon:
1. In Kuta/Seminyak, if you want to change money do so in small amounts, and count your rupiah properly. Apparently some money changers there like to advertise very good rates and then with some sleight-of-hand they will give you less rupiah, usually in small denominations so you have too many rupiah notes that you lose count and don't notice you are being short-changed. I was given this warning by the local driver I hired. Also when I changed money in Seminyak, this money changer guy gave me a whole big stack of RP20k notes, when he had a big stack of 50k notes. The way he gave me the notes was also very suspicious, so I made sure to count my notes closely. Lucky for me.
2. In Ubud, best rate to change money is inside the Post Office as well as in one or two money changers very near to the Post Office. When the Monkey Forest Road money changers were offering RM1=RP2600, I was getting RM1=2780 at the post office!
3. Rafting on the Ayung river was kinda fun. Had a PRC tourist from another raft fall in the river, and our guide had to rescue her onto our boat!.
4. The monkeys in Monkey Forest Sanctuary in Ubud (and in the other areas) are very aggressive. I told one of my friends to hide the bag of bananas but my friend degil and don't want to listen, so less than a minute later, a monkey came and grabbed the entire bag and ran away!

Also the monkeys were grabbing mineral water bottles (both the small ones and the 1.5L bottles) from tourists.
5. If you are tempted to buy the cheap "aromatherapy" soaps (around RP10k for a big bar) in Ubud market or elsewhere, I have bought and used many of them and found that:
- generally the scents don't last for long and after a while, all you have is a fast-dissolving bar of natural soap with no scents!
- If you want to buy the soaps, I would recommend either Kou (in Jalan Dewi Sita, in Ubud) whose soaps are about RP35k each, or the Bali Flower range (around RP10k) whose soaps may not smell as nice as Kou but at least the scents last longer than the other cheap ones, or the brown-paper wrapped soap you can find at one particular trader in Ubud market (ground level near where a lot of wooden plates/bowls are sold).
- Avoid the brightly coloured (pink, light blue, dark blue, etc) paper-wrapped soaps you can find all over Ubud market, the scents don't last.
- And if you have any illusions that local Balinese use these soaps... they don't! Only silly tourists like you and me buy them. Locals use the regular commercial soaps like we do at home.
6. Having seafood dinner on Jimbaran beach is amazing! Get a local to recommend you a place unless you already know of a good place from a good guidebook.
My 2 most favourite Balinese temples/religious places to visit is Tanah Lot and Gunung Kawi