HOW TO BREAK THE WORRY HABIT BEFORE IT BREAKS YOU.
RULE 1: Crowd worry out of your mind by keeping busy. Plenty of action is one of the best therapies ever devised for curing “wibber gibbers.”
RULE 2: Don’t fuss about trifles. Don’t permit little things—the mere termites of life—to ruin your happiness.
RULE 3: Use the law of averages to outlaw your worries. Ask yourself: “What are the odds against this thing’s happening at all?”
RULE 4: Co-operate with the inevitable. If you know a circumstance is beyond your power to change or revise, say to yourself: “it is so; it cannot be otherwise.”
RULE 5: Put a “stop-loss” order on your worries. Decide just how much anxiety a thing may be worth—and refuse to give it any more.
RULE 6: Let the past bury its dead. Don’t saw sawdust.
~ Dale Carnegie, How to Stop Worrying and Start Living