As glorious as sunshine feels, too much of it can cause burns, changes in skin texture, dilated blood vessels and skin cancers. Ideally, try to avoid peak sun hours, from 10 a.m. to 4 p.m., during your family’s outings. When that’s unrealistic, be smart about exposure. A half hour before you head outside, apply sunscreen with a sun-protection factor (SPF) of at least 30.