Weighing yourself too often can cause you to obsess over every pound. Penner recommends stepping on the scale or putting on a pair of well-fitting (i.e. not a size too small) pants once a week. “Both can be used as an early warning system for preventing weight gain, and the pants may be a better way to gauge if those workouts are helping you tone up and slim down.” [Tweet this tip!]

Fluids: Fluid needs increase as women age. The reason: Kidneys become less efficient at removing toxins. “Drinking more fluids helps kidneys do their job,” Schwartz says. “Unfortunately, thirst signals often become impaired with age, so people are less likely to drink enough water and other fluids.” Rather than fret about how many glasses to drink, Frechman says, check the color of your urine. "It should be clear or very pale colored. If it becomes darker, you need more fluid.”