Use acceptable terms for members of racial, ethnic, religious and other minority groups. Examples of politically correct terms are "African-American," "Caucasian," "homosexual" and "differently abled."
Use gender-neutral terms whenever possible. For example, "first-year student" is often preferable to "freshman," and terms like "woman doctor" may be deemed offensive; just say "doctor" instead.
Be respectful and tolerant of cultural practices that may be new to you.
Avoid telling jokes or making comments that belittle specific genders or minority or cultural groups.