1] Nobody there cares that you're white except you.
2] Don't enter the prayer area until you wash your hands, feet, and face (facilities are provided).
3] Take off your shoes.
4] Don't walk in front of someone who is praying.
5] If it is prayer time, sit down in the back and shut up.
6] Don't take pics without permission.
7] Declare shahadah and come home, white man.