Here you have some useful information, but over all don't forget to grab your sun block and your camera!
1) VISA: Nationals of 169 countries can visit Bali visa-free (for 30 days), while Visa on Arrival applies for others at USD 35 (extendable once).
2) WEATHER: Wet season: October-April; Dry season: May-September; Best time to go: May-August.
3) SPECIAL DAYS: No travel during Saka New Year, aka ‘Nyepi’ (usually coincides March - specific dates vary every year based on the Saka lunar calendar).
4) DRIVING: Drive on the left.
5) RENTALS: International drivers' license required to drive and rent cars and motorbikes.
6) TAXIS: Blue Bird Taxi (+62 (0)361 701 111) is most popular and reliable - all of their taxis are metered. Read more...
7) TRAFFIC: Traffic in Bali is notoriously congested so allow plenty of time if you need to be somewhere at a specific time.
9) CURRENCY: Indonesian Rupiah (USD 1 = IDR 14,000 more or less)
10) ATMs: ATMs dispense IDR 50,000 or 100,000 bills; withdrawal fees using foreign bank cards, Visa or Mastercard vary and can be high. Beware of skimmers and rigged units, and remember to take your money and card after each transaction.
11) EXCHANGE: Always check your money when exchanging money at street-side money changers, even if they’re signed ‘Authorized’. Scams are more than frequent.
12) BARGAINING: Bargain hard, from half tag price, only at traditional and art markets. Not at shopping malls.
13) TIPPING: Tipping is not compulsory since prices are subject to 10% government tax and up Read More... Staying Connected ADD TO TRIP!
14) SIM CARDS: SIM cards are widely available at kiosks and convenient stores; most are mobile internet-ready. Verify SIM and micro-SIM factors upon purchasing.
15) ELECTRICITY: 220 Volts, 50Hz. Electrical plugs are two-pronged ‘Europlug’ type. Customs and Etiquette ADD TO TRIP! 5 16) TEMPLES: Must-wear on temple visits: waist cloth and sash. Temples are generally free to visit, although most keepers will show visitors to a 'donation box'. Always use right hand for gesturing; never left hand or feet.