One of the best ways to live a peaceful life is to simply acknowledge that God knows best. With anything in life, even your good situations, can become stressful. We must give our situations to God. We have to let it go and acknowledge that it is in God's hands & not out own. The moment you give your situations to Christ you will receive peace.
Tell God & show Him that you trust Him. He knows better than we ever could. Pray about whatever you are going through and focus on the eternal things. Eternal means lasting or existing forever; without end or beginning. We can't get too caught up in the temporary things today or else we will lose sight of what really matters. Nothing is worth more than your soul.
Psalm 95: 1-2
"Oh come, Let us sing for joy to the Lord, Let us shout joyfully to the rock of our salvation. Let us come before His presence with thanksgiving, Let us shout joyfully to Him with Psalms."