Prayer (Du'a) is one of the most important things in Ruqyah (and, of course, in life in general) and one of the most important factors whether Ruqyah works because healing comes from Allah alone. When our prayer is accepted, healing is almost certain. That is why it is important to know how our prayer is better accepted by Allah.
Concerning the Shalat, it is obvious that one should perform it at the beginning of its time, perform it according to the Prophet's s.a.w. Sunnah, and be humble and concentrated. During Du'a, the voluntary supplication, the following points should be observed:
One must realize that only Allah responds to prayer and no one else has any power.
It follows that one should only ask Allah for anything.
Tawassul is an important aspect of prayer. Linguistically it means "coming closer to a goal". In Islam, it means using methods that help the prayer being accepted.
Tawassul with Allah's names and attributes. The Koran teaches us that Allah loves prayers, in which His glorious names and attributes are mentioned. Our prayer gets more depth. We should name the particular attribute, which corresponds to our request, e.g. ar-Razaq when we ask for livelihood.
Tawassul by listing the good things given to us by God. This will strengthen our love for Allah and the bond to Him.
The mentioning of one's own condition helps one to recognize one's own weakness and being in need. But beware of self-pity!
One should explicitly name what one wants and what one would do if one would get it.
Impatience can be a reason why our prayer is not accepted. ( And man supplicates for evil as he supplicates for good, and man is ever hasty. [Al-Isra' 11])
We should, of course, only ask for pure and good things, and let not ourselves be dominated by feelings of hatred and revenge.
Very important is the right intention as with everything we do. We should always check it.
We should make the prayer with an attentive heart, and not just babble it down.
One should ensure that one's own livelihood is "halal", otherwise the prayer is not well received (if at all).
Prayer should include Salawat (Blessings on the Prophet).
The Du'a should not deter one from more important things, eg. the obligatory prayer.
One should praise Allah before prayer. Whoever does not do this is called hasty.
One should raise one's hands with hands upwards.
One should pray in the direction of the Kiblat.
One should be in the state of ritual purity.
If one can, one should cry.
One should hope for the best from Allah.
Pray with humility and taqwa (God-fearingness).
One should confess one's needs only to Allah.
Pray softly and not with a loud voice.
Admit and repent your sins.
When one asks, one should be brave and show Allah how necessary one needs an answer.
Repeat the prayer three times, which highlights the importance of the petition.
Prayer should be short, but much comprising, e.g. for the good in this world (and Allah knows best what is good for us), and for the good in the hereafter (which only He knows).
One should pray for oneself first and then for others.
One should say "Ameen", which means "accept" (the prayer).
One should pray all the time, not just when one has problems again.
One should also pray for the little things in life. Allah loves to be asked.
There are certain situations in which prayer is better accepted:
When one is oppressed or one has suffered an injustice.
When one is in distress.
After a hard trial, where one remained patient.
When one fasts.
When one reads the Qur'an.
During Haj, Umrah or Jihad.
Prayer for someone in his absence.
If one always remembers Allah.
If one is a righteous ruler.
There are certain times when prayer is better accepted:
In the last third of the night.
During Azan (prayer call).
Between Azan and Iqamah .
During the mandatory prayer.
During the prostration.
Before the Salam of the mandatory prayer.
After the obligatory prayer.
A certain time on Friday, so one should pray a lot on Friday.
Between the two Khutbas (sermons) of the Friday prayer.
When one has read the whole of the Qur'an.
After the ablution for prayer.
Before drinking Zam-Zam-water.
In the "Night of power", most likely in the night of the 27 th Ramadan.
When one visits the sick.
While it is raining (not during a storm or devastating rainfall).
The time before the Dhuhur prayer.
When a rooster crows.
The etiquettes of sleeping
The Sunnahs of the evening and night are very important as they provide protection at a time when the Satans are the most active, but at the same time our defense is weak.
Ruqyah - Islamic Exorcism