The word of God relaxes me. When I read other stuff, I often fall asleep but it's not the same sweet peaceful sleep. I can't explain the difference other than when I wake up, I am still at peace. I'm not groggy or still tired after falling asleep reading the word of God.
One place I often go is to the Psalms to settle my nerves so that I can rest. Here are three Psalms that speak about rest in poetic terms mixed with the power of God's word. The next time you can't get to sleep try reading these Psalms.
Psalms 116:1-19 NIV I love the Lord, for he heard my voice; he heard my cry for mercy. Because he turned his ear to me, I will call on him as long as I live. The cords of death entangled me, the anguish of the grave came over me; I was overcome by distress and sorrow. Then I called on the name of the Lord: “Lord, save me!” The Lord is gracious and righteous; our God is full of compassion. The Lord protects the unwary; when I was brought low, he saved me. Return to your rest, my soul, for the Lord has been good to you. For you, Lord, have delivered me from death, my eyes from tears, my feet from stumbling, that I may walk before the Lord in the land of the living. I trusted in the Lord when I said, “I am greatly afflicted”; in my alarm I said, “Everyone is a liar.” What shall I return to the Lord for all his goodness to me? I will lift up the cup of salvation and call on the name of the Lord. I will fulfill my vows to the Lord in the presence of all his people. Precious in the sight of the Lord is the death of his faithful servants. Truly I am your servant, Lord; I serve you just as my mother did; you have freed me from my chains. I will sacrifice a thank offering to you and call on the name of the Lord. I will fulfill my vows to the Lord in the presence of all his people, in the courts of the house of the Lord— in your midst, Jerusalem. Praise the Lord. (Emphasis mine)
Psalms 4:1-8 NIV Answer me when I call to you, my righteous God. Give me relief from my distress; have mercy on me and hear my prayer. How long will you people turn my glory into shame? How long will you love delusions and seek false gods? Know that the Lord has set apart his faithful servant for himself; the Lord hears when I call to him. Tremble and do not sin; when you are on your beds, search your hearts and be silent. Offer the sacrifices of the righteous and trust in the Lord. Many, Lord, are asking, “Who will bring us prosperity?” Let the light of your face shine on us. Fill my heart with joy when their grain and new wine abound. In peace I will lie down and sleep, for you alone, Lord, make me dwell in safety. (Emphasis mine)
Psalms 91:1-16 NIV Whoever dwells in the shelter of the Most High will rest in the shadow of the Almighty. I will say of the Lord, “He is my refuge and my fortress, my God, in whom I trust.” Surely he will save you from the fowler’s snare and from the deadly pestilence. He will cover you with his feathers, and under his wings you will find refuge; his faithfulness will be your shield and rampart. You will not fear the terror of night, nor the arrow that flies by day, nor the pestilence that stalks in the darkness, nor the plague that destroys at midday. A thousand may fall at your side, ten thousand at your right hand, but it will not come near you. You will only observe with your eyes and see the punishment of the wicked. If you say, “The Lord is my refuge,” and you make the Most High your dwelling, no harm will overtake you, no disaster will come near your tent. For he will command his angels concerning you to guard you in all your ways; they will lift you up in their hands, so that you will not strike your foot against a stone. You will tread on the lion and the cobra; you will trample the great lion and the serpent. “Because he loves me,” says the Lord, “I will rescue him; I will protect him, for he acknowledges my name. He will call on me, and I will answer him; I will be with him in trouble, I will deliver him and honor him. With long life I will satisfy him and show him my salvation.” (Emphasis mine)