Here are some Wazifa Dua for those who have difficulty sleeping at night from the al-Adzkar book of Imam Nawawi.
1. History of Zaid bin Tsabit
Once when Zaid bin Tsabit was struggling to sleep for some reason, he complained to the Prophet, and he told Zaid to read this prayer:
اللَّهُمَّ غَارَتِ النُّجُومُ ، وهَدَأَتِ الْعُيُونُ ، وَأَنْتَ حَيٌّ قَيُّومٌ ، يَا حَيُّ يَا قَيُّومُ عَنِ
"O God, who fashioneth the stars, Who maketh the eyes to shine, Thou art the Living and the Protector, O the Living and the Guarded, make my eyes dim and dim the night."
After reading this Wazifa Dua for those who have difficulty sleeping at night, he suddenly lost his sleep sickness, and Zaid returned to sleep.
2. History of Khalid bin Walid
It is said that Khalid bin Walid once talked to Prophet Saw that he had trouble sleeping at night, and then the Prophet suggested the following:
في ررفتين
Then Allah's Messenger (may peace be upon him) ordered him to recite (to seek Allah's protection) in his sleep by reading: "I seek refuge in Allah with the perfect word of God from his anger, and from the evil of his servant and from the temptation of the devil."
3. History of Khalid bin Walid
As Khalid's story was told earlier. But with a different prayer recipe.
اللهم رب السماوات وما أظلت ورب الأرضين وما أقلت ورب الشياطين وما أضلت كن لي جارا من شر جميع الجن والإنس, وأن يفرط علي أحد منهم أو أن يؤذيني عز جارك وجل ثناؤك ولا إله غيرك
"O God of heaven and what is shouted, Lord of the earth and what is lifted up, Lord of the devils and all that is misleading, Be Thou (my Lord) at my side (from protecting me) from all the evils of the jinn and man, to them or to disturb any of them. Your protection is so great and so is your praise, and there is no God besides you. "
For Rules to do Wazifa and Taweez check this link
http://hanfi-1.blogspot.com/2013/11/faq.html