Just back from first trip to Bali--and wow there willl be more!! A few things that I learned: **An ATM card is fine to get money.
**pack shorts and sandals in carry on to change at the airport--it's warm!
**bring less!!
**bring all of your camera charging, film card, etc stuff--didn't find a lot of modern digital camera accessories around Ubud.
**If you go to Munduk--you'll want a light sweater for nite--really was chilly! Ask for Putu at Puri Lumbung for your trekking guide!
**Use a driver!! Arrange ahead of time--starting with airport pick up--I loved Dewa Alit: email me or try 081 246 99691 to get him.
**Bring Tricycline for Bali belly. 2 caps 3X/day.