Yes, firstly there are the sunnah adkar, which you should learn. Second, there is the sunnah of sleeping in wudu. Thirdly, there are the Quranic recitations before sleep (ayatul kursi, the last two verses of al-Baqara and the last three surahs, recited thrice and each time blowing in hands and rubbing the body for protection). Fourthly, there is the sunnah of spitting over the left shoulder if scared by a dream, saying ta’awudh, and changing the side one has been sleeping on. Fifthly, you can try herbal supplements to increase gaba and alpha waves, such as L- theanine or local roots.