I know this may sound stupid... but if you are renting a villa in Bali then make sure it is located on the beach!!
We were tempted by an offer from BumbuBali (one of the best known restaurants on the island) who also had their own villas. These were fine, but they were a good walk away from the beach (10-15 mins). Somehow that part of the holiday didn't really feel like being on holiday. It was hot, and on some days very humid as well... there was no fun having to walk to and from the beach and across the busy road.
We moved after a few days to a hotel beach-side and what a difference! Just being able to hear the ocean and feel sea breezes made it feel like being on holiday.