How I Sleep A series about how people with highly specific sleeping situations fall asleep and stay asleep — and the products they use. Illustration: Arnaud Boutin Nashville-based Southwest flight attendant Kerry Ann Kline has been on the job for a year and seven months now; because she’s still earning her stripes, she never quite knows what to expect from her work schedule. “I’ll alternate being on reserve for a month and then the next month I’ll have a line, which means I know what trips I’ll