[annalex]

Be nothing solicitous; but in every thing, by prayer and supplication, with thanksgiving, let your petitions be made known to God. [7] And the peace of God, which surpasseth all understanding, keep your hearts and minds in Christ Jesus. (Philippians 4:6-7)

[defconw]

It also helps to look in the mirror and remind yourself that you are in fact not in charge of anything but your own behavior. Takes the pressure off.