Check visa requirements (especially if you want to work/study/stay for a long time and can't be there with just with your passport as a tourist), buy a plane ticket, have a savings (and an ATM/debit card to go with it), pack.
Optional:
- find a place to live, or join couchsurfing.com or locate hostels as an interim if you don't have a place pre-arranged.
- get a job, register for classes, or whatever you'll be doing there.
- contact anyone you know or that someone you know knows in the move-to area.
- have your mail forwarded if necessary (if you're moving out of the current place and/or no one there can collect it for you) and/or change your address to a new one in the current or new countries (at the post office, with your friends, bills, health insurance, etc)
- get an International Drivers License
- learn about the country you are moving to (language, currency, customs.........)
the list could go on and on.......