Anyone sure he wants to use a halal toilet, if there ever was
one? 
Say before entering the toilet: In
the name of Allah, O Allah! I seek refuge with You from all
offensive and wicked things
One should enter the toilet with the left foot and
leave with the right foot.
It is not permissible to enter the toilet whilst
carrying or wearing anything bearing the name of Allah, such as the
Quran, or any book with the name of Allah in it, or jewelry such as
bracelets or necklaces engraved with the name of
Allah.
One should remain silent whilst on the toilet.
Talking, answering greetings or greeting others is
forbidden
One should not face nor turn your back on Mecca
whilst relieving yourself. One should sit at 90
degrees
It is considered forbidden to relieve oneself whilst
standing up, lying down or if you are completely nude.
Do not look to the private parts of the body nor the
waste matter passed from the body.
Do not sit more than needed.
Do not spit, blow nose, look hither and thither,
touch the body unnecessarily nor look towards the sky but relieve
oneself with the eyes downcast in modesty.
After relieving oneself it is essential to perform
Istinjaa (washing with water) of the anus and/or genitals with the
left hand and water. The precise mode of performing Istinjaa has
also been defined by religious leaders: "At the beginning of
Istinja, it is preferable to use toilet paper three times. If
Istinjaa is being done on a hot day, then the person should start
from the front to the back and then from the back to the front and
the third time from the front to the back. If Istinjaa is being
done on a cold day, then he should begin from the back to the
front. After wiping, he should wash his hand first and then he
should cleanse himself with two fingers and three fingers if
necessary together with ‘pouring’ water. When using the two
fingers, one should keep the middle finger in front and the ring
and index finger behind it. After beginning with the fingers in
this position, he should bring the ring finger forward and rub with
the middle finger and ring finger. Thereafter, he will wipe with
the index finger, if necessary. He should continue until all the
impurity and smell is removed. The left over water after Istinjaa
is paak only if there is no impurity in it." (Mufti Ebrahim Desai)
And further: "To wash the orifice with water, even though no filth
is stuck to it after relieving oneself, is desirable. If the filth
is sticking to it (less than a Dirham or equal to it) then the use
of water is 'Sunnah' (optional) and in the case the filth stuck to
the orifice is more than a Dirham then its washing with the water
is 'Fard'. (obligatory)" Islamic Academy
Other than toilet paper, water and the left hand
Istinjaa can be performed with earth, grit, stones and worn-out
cloths provided they are all clean. It is forbidden to perform
Istinyaa with bone, any edible item, dry dung, baked brick,
potsherd, coal, fodder, writing paper and anything which has even a
small value.
When leaving the toilet one should also say a
prayer, "Praise be to Allah who relieved me of the filth and
gave me relief."