How can I do Ruqya for myself before bedtime?

The best way is to follow the path of prophet Mohammed. It is narrated in an authentic hadith that when our prophet would go to bed, he would put both his palms together and recite 3 verses of the Quran: 1- Qul hua Allah Ahad… 2- Qul aaouz birab elnas… 3- Qul aaouz birab elfalaq…, then he would (yanfuth) blow air in his hand from his mouth, some scholars said, accompanied by slight droplets of saliva. Then, he would wipe his head, face and as much as he can from the front of his body. He would repeat this process 3 times, in each time he would recite all 3 verses. On his deathbed, when he could not do that, he asked his wife, Aisha, to do that for him. In addition, Recite the last 2 verses of the Cow Chapter “Surah Al-Baqarah” every night. Prophet Muhammed said “The Almighty Glorious Allah wrote a book wrote thousand years before He created the heavens and the earth, He revealed down 2 verses from this book, by which He concluded Surah Al-Baqarah, No Sheitan would settle in a house at which these verses are recited for 3 nights according to a hadith.”