The foundation of peace is only in Jesus Christ and His work. He, our Rock, trembles not as we cling to Him in our trials - He is unshakable!
"How do we get this peace?" Through the means of grace, Jesus says, "My peace I give to you." We welcome therefore every chance to come to the feast of the Lord's Supper and the Word. -- "I don't feel that peace." Culprits include worry, fear, guilt, and adverse events. The solution? Look at the Peace-Giver only (for with the Cross in our focus, all else is blurred), He who cares for today and tomorrow; give up your sins to God, confessing and being forgiven. Forgive your brother. Be thankful for all things (which is really God working in your nature).
Look ahead to your heavenly home. Thank God for the feast that awaits, that He has prepared for you in love.
Soli Deo gloria.