So much for Women’s Lib. An eighth-grader took cues from a 1950s etiquette book touting white gloves and girdles in a quirky bid to be popular at school a couple years ago — and now, she’s laughing all the way to the bank. Teenager Maya Van Wagenen cleverly chronicled how she used tips from the decades-old “Betty Cornell’s Teen-age Popularity Guide’’ to gain an edge as a student new to Brownsville, Texas. She followed some of Cornell’s sage advice, which included the gloves, white pearls and girdles, as well as how to properly squeeze pimples, shave one’s legs for summer...