Recognize what yours are and be willing to work on them. Don't judge people by stereotypes. We're all much more complex than that. It's really hard when you are not a part of the majority. Don't tell jokes or use labels that put down people who are different from you.
Words can really hurt.
Don't tolerate violence, cruelty, or insensitivity perpetrated by others towards people who are different from you. Speak up when others are being insensitive. Attend an event at the College offered by a group that is different from you. Be open and respectful towards people who are different from you. It's up to all of us to build a better, more peaceful world.