I am always looking for ways to keep exercising interesting and it's not always been too easy but with the explosion of group classes, there are so many options.
My latest favorite is Punk Rope, a cross between third grade recess (double dutch y'all) and boot camp. Punk Rope combines conditioning drills, rope jumping and core and flexibility training for a very creative, effective, edgy workout. Been years since you picked up a jump rope? No worries, since rope jumping experience is not necessary for this class. Jump ropes are provided so that means one less thing to carry in your gym bag. Pig tails optional.
Right now Punk Rope is available at Healthworks, Boston's own group of women-only fitness centers. Don't live in the Boston area? Check your local gym for similar jump rope combo classes.