There is some great advice above.
There are more mental changes than practical one in preparation to move to Argentina.
My advice would be learn to cope with less. Be less materialistic. Learn how to repair things and make others that you would normally purchase. Have patience with the things that you have, don't look for more.
Lower expectations with everything. With services, bureaucracy, work, play, culture. If you try to keep up appearances and criticize too much, you will become a curmudgeon and fall into the risk of maintaining a negative outlook on things.
You are a foreigner, probably from the Western world. Latin Americans have a strong political and cultural identity that sometimes portrays Westerners as oppressors and opportunists. While extremely friendly people, entering into a close relationship with an Argentine as a foreigner is no easy to task.
To stave off loneliness, and not be a diplobrat who only surrounds themselves with other foreigners, focus on joining some groups or societies. Play a sport or study in a group. This is your portal to accessing the local people and culture.
If you feel that your life isn't developing the way that you would like here, or that the country is inhibiting your potential happiness, your career or your personality, then don't try to weather it through. The likely outcome is depression. Return to your own country, culture. Refresh then maybe return to Argentina at a later date.
Change your priorities. Don't go to the bank deposit money, commute to your office on time, queue to pay a bill. Make these secondary objectives. Instead, focus on taking your time, observing, interacting with world. Arrive late sometimes, and as the Pope said recently, 'make a mess'.
The only physical preparation you need to migrate to the southern cone is, as said before, a good stash of US dollars to see you through.
