I'll wait for Todd to really respond, but Harb Carvers are a type of skate that mimics the experience of carving turns on skis by allowing you to "carve" your turns on asphalt.
Different skiers tend use different skill blends in their skiing.? If you're a skiers who emphasizes edging (aka tipping), lateral balance (angulation), and fore-aft balance over rotary / steering / twisting movements then you'll probably like the Harb Carvers.? They grip very tightly to the "black snow" and give much the same sensations as carving on firm snow.? As an added benefit you get a modest cardio workout skating back uphill -- human powered lift service

.? It can take a couple of days at first to learn how to make them really turn.? A middle-aged friend who attended an early season ski camp last year felt none of his usual early season aches or fatigue during the camp and attributed this to his time on harb carvers which he said worked all the little muscles we use in skiing.
If you do give harb carvers a try, wear protection the same as an aggressive inline skater or skateboarder would:? helmet, wrist guards, knee and elbow pads, crash pants or hockey pants, etc.? Also, find some cheap rubber hose or nordic walking pole tips to protect the tips of your ski poles.
Besides playing on harb carvers, I do some ski-specific exercises around 3 themes.
1.? Lateral/side-to-side balance via angulation (counterbalance)
You've seen photos of world-class racers with almost a 90* angle between their torso and legs.? This is an extreme example of maintaining lateral balance.? To maintain good lateral balance, we have to move our center of gravity -- think belly button -- closer to being over the skis.? Sometimes a little, sometimes a lot.? All skiers do it to some degree unconsciously, but some of us train to do it more strongly.? To move the belly button and torso laterally is basically the same as doing a side crunch (contracting the obliques.)? So I do lots of
side crunches, usually on a stability ball.? (
) To ensure lateral flexibility and
range of motion, every day I bend over sideways to the right from a skiing stance and touch my right knuckles to the floor beside or slightly behind my right foot, then switch to the left side and repeat several times.? This gets me as close to that racer's 90* angulation as my body will get on dryland, and ensures that my middle-aged body won't complain when I ask for more moderate angulation on snow.
2.? Fore-aft balance
There are basically two options to get your center of gravity forward of your feet when skiing:? pull the feet back (they're light) or push the upper body forward (it's heavy and slower to move.)? I choose to get forward by contracting my hamstrings to pull my feet back relative to my torso.? Steeper terrain and shorter turns require more forceful pullback to stay in fore-aft balance, so I do
hamstring curls on a stability ball to enhance my fore-aft ability on snow.? (
) I also do one-legged squats.
3.? Ankle strength and proprioception
I keep a
teeter board (1" dowel fastened to foot-sized board) by my front door.? Every time I use the door, I balance for a moment on each foot.? This is basically the old balance on a broomstick challenge, except the "broomstick" won't fly away if you fall because it's bolted to the footboard.? Your skiing will skyrocket to an entirely new level if, like Jim, you master the fine art of gracefully slipping out of your pantyhose while balancing on a teeter board (no matter whether the front door is open or closed at the time -- both work equally well.)