Spinning a lot of plates these days? Meet Nina Lentini: In 18 months, she went from editing one daily newsletter to still editing that one, as well as 10 weeklies that generated new ad revenue at no extra cost to her company. She now starts at 7:30 a.m. instead of 9, and works Saturday and Sunday mornings. Holidays? “I work most holidays,” she tells Michael Winerip.