All the abovementioned points are excellent. I wholeheartly agree with nepal-hamro.  I was open with my colleagues and told them some of my weakness at workplace.  That was my blunder.  I will add a few:

- If you are 21+ and you have frens below 21, don't let them drink at your apartment/house.  
- Be on time
- Dress professionally at work.  Americans do closely watch your appearance even though they say they don't care.