Tip #10 - To pray with humility and fear.
One should humble himself when requesting something from Allah, the Lord of the worlds, they should also fear His punishment and have hope for forgiveness.
Allah has said in the Quran, call upon your Lord with humility, and in secret. Verily, He does not like the aggressors. [7:55]
Likewise, Allah described the Prophet Zakariyyah (peace be upon him) and his wife as, verily, they used to hasten to do good deeds, and they used to make dua to Us with hope and fear, and used to humble themselves before Us. [21:90]
So it is important that the servant shows humility to the Creator, and humbles himself before Him while making dua. Is it not befitting that a slave appear in front of his Creator and Master in a state of humility, realizing the status of his Lord, and fearing his own shortcomings in his duties towards Him?
This tip is taught to us by God himself, so that we perfect our duas and thereby, increase the chances of getting them answered.