Concentrate on counting your blessings and you'll have little time to count anything else.
Quite honestly, most people are quick to "write someone off." But our God is a God of the second chance. Learn from One who is patient with you, and you'll learn to be patient with others.
Prayer is never complete until God has answered.
Pray according to faith, not circumstances.
Nothing is so sour that it can't be sweetened by a good attitude.
Ultimately, all our complaints are directed against God.