Dos:
1. Buy old and reliable car. Don't run after fancy car. 
2. Try to study really good, this will help you after you find a job after you graduate. 
3. Try to watch how American pronounce and play with certain words, that might help a lot to understand their jokes and cultural talks. 
4. Always be in touch with your real friends. It is really hard to make real good friends in this country and its easy to lose them. People often lose them by making being busy as an excuse. Its tough to get that friendship back once ignorance has played it's part. You need good friends the first, when you need help. 
5. Always try to improve your skills, when you have time. For example, be expert in excel if you allowed a laptop in gas station, you got an idea. 
6. Never feel lonely, that totally destroyes you.


Don't:
1.  Don't spend all your money towards your girlfriend/boyfriend, because there is high chances that you might not get married with a same person. 
2.   Never get offended by American's individualist behaviour. For example, they might talk to you really good one day and totally ignore you the next day. It's not personal, thats how they were raised. 
3. Never say everything about yourself to be friendly. That bites back. 
4. Never show your weakness at workplace to be friendly or open. 


These are few things that I learned.