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Go for a stroll.

Taking a daily half-hour walk can lower heart disease risk by nearly 50 percent, according to Nieca Goldberg, MD, medical director of New York University’s Women’s Heart Center and author of Dr. Nieca Goldberg’s Complete Guide to Women’s Health (Ballantine, 2008). “Everyone thinks that the more intense the exercise, the better for you,” she says. “Research has shown that it’s even more important to do moderate-paced exercise regularly.” If you’re time-crunched, take three ten-minute walks per day; it’s just as good for your heart as one 30-minute walk.