Situation: A friend wants to borrow your car—and you've seen how she drives.
What to Say: If you make a policy and stick to it, it'll be hard for her to argue with you.
"I know this sounds weird, but I just have a thing about this car. I get freaked out about anyone else using it." — Douglas Stone, coauthor of Difficult Conversations
"I'm sorry, my insurance policy says that I just can't have anybody else driving the car." — Jeffrey Fox, author of How to Become a Great Boss
Or opt for humor that gets the point across: "I'd like to, but if anything happened to it, I'd have to kill myself." — Holly Weeks, instructor at the Radcliffe Institute at Harvard University and author of the Harvard Business Review article "Taking the Stress out of Stressful Conversations"
Make 2014 your year to shine! Our January issue features a complete guide to brightening all areas of your life, plus Oprah's foolproof stress cure, the secret to a great makeover and the latest Oprah's Book Club 2.0 novel.