'When one of you wants to relieve himself, let him not face the Qiblah nor turn his back to it; let him face the east or the west.' (Bukhari)
*It is of the Sunnah that one enters the washroom with his left foot, and exits with his right foot. When one enters he should say: 'Bismillah', (i.e. I begin with the name of Allah) it is also of the Sunnah that one should say: 'A'oodthubillah minal khubthee wal-khabaa'ith.'
Meaning: I seek refuge with Allah from the male and female devils.
When one exits the washroom he should say: 'Ghufraanak.'
Meaning: I ask You (Allah) for forgiveness. It is praiseworthy for one to do this even if he is in the desert. When one wants to sit he should say the Dhikr for entering the washroom, and once he has finished, he should say the Dhikr for leaving the washroom.
*It is lawful for one to urinate while standing up or sitting down. Two conditions must be met when one urinates while standing up:
