Happy are those who do not follow the advice of the wicked, or take the path that sinners tread, or sit in the seat of scoffers; but their delight is in the law of the LORD, and on his law they meditate day and night.
You sleep at your best when you follow God's law. If you find yourself waking up in the middle of the night for not reason, check with God. If you find yourself waking up every morning doubting a decision you have made, it's because God is still not pleased with your direction. Try adding 15 more minutes in the morning and in the evening to meditate and worship with God. You'll see how the decisions you make in the day will help you sleep at night.