DO always stand up and shake hands when being introuced to people.
DO NOT become offended if locals give you a funny nickname once they get to know you...mine are Pato..Duck and Donald Trump!
If you use public buses DO profile people, sit next to elderly persons, students, women with children, persons carrying Bibles
DO NOT enter into religious nor political conversations in public, especially with strangers
DO NOT invite strangers to your home or lodging place, especially persons you have met in Bars or Clubs!!
If service is poor in one plae you DO have teh right to walk out and look for another place to shop
DO make friends with your neighbors, introduce yourself.
saludos.