Is this a term gig, or permanent? Congrats.
Here are tips from a Peace Corps planner and packer:
Alert your credit card companies so they won't freeze your cards once you start to use them.
Consider putting a freeze on your credit accounts. I did that to two of the three credit-reporting companies before I came to Morocco.
Consider renters insurance for wherever you leave your stuff in the States, if you do.
Second the motion on the shots. Check out your local health department if you don't have insurance. The CDC site will say which you need, but I'd think Hep A and B, minimum.
I needed a bunch of passport-sized photos for in-country IDs, but your new gig probably will supply those.
Get a Lonely Planet and start working on phrases.
Definitely get the converters for electronics, but look into a surge protector, too. I fried two laptop chargers here before realizing what was happening.
Get a Skype account. If you want to call landlines or cell phones back in the States, put money in the account before you leave. I can't do it from Morocco without a fee; not sure if Indonesia might have the same rules. But if you establish the account now, you can have someone else add money if you need it. (Computer-to-computer calls are free.)
Be sure to cancel Netflix, too. The online viewing doesn't work outside the states. Neither does NBC, dammit.
Line up online services for any remaining account you can.
You'll still have to file fed taxes, and maybe state. Here's a suggestion: I did it online from here with Turbotax for free as a State Farm customer. Even though I have no insurance policies, I stuck $100 in a savings account just so I could have an account so I could file taxes for free.
Consider leaving power of attorney to someone back in the States, just in case you need someone to handle something big and important while you're gone.
Make copies of all your legal documents. I scanned mine to PDF and brought them with me. Consider that for your medical records, too.
Don't overpack. I packed 80 pounds of crap for two years and now that I'm here realize I should have left about 1/3 of it at home.
You can buy clothes (and probably everything else) when you get there. Bring stuff that reminds you of home.
Oh, and register to vote by absentee ballot.