Many women hate their upper legs so much that they don't even try to firm them. Mistake. "Many of your major thigh muscles — your hamstrings and quadriceps as well as your butt — are actually easy to tone," says Evelyn Nunlee, a New York City personal trainer for 15 years. (Inner thighs are trickier, she concedes; to target that trouble spot, add crunches and other lower-abdominal exercises, because your stomach muscles are close to those of your inner thighs.) For quickest results, do Nunlee's