"While there is still time, correct your faults and endure patiently what you cannot correct completely. Give yourself to prayer while waiting for the Lord Himself to provide--either by correcting now or by correcting at the end-time harvest." -St. Augustine
Amen to that.
Sometimes things are literally out of our hands, and try as we might, there may be nothing that we can do ourselves. So work on what you can. Stop wasting precious time and energy on endeavors that you simply cannot do alone.
Don't you just love it when God tells you exactly what you need to hear?