Jack Cochrane Professional Ski Instructor

Jack's Skiing TIPS & TASKS
Check out the - The Unofficial Guide to Good Skiing - Visual Cues and Body Movements

Choose a slope with a very mild (almost flat) pitch to begin this task.
Establish a medium width (boots shoulder/hip width apart) stance.
At a slow speed TILT the top of both boots in the same direction either left or right.
To accomplish this tilt move both knees in the same direction AT THE SAME time.
A slight forward & lateral movement helps also.
Do not steer the skis, let them gradually make a turn (or at slow speeds just a direction change). The side cut of the edge of the ski causes this direction change.
Repeat above but TILT the top of the boots in the opposite direction.
NEXT increase the speed. Focus on tilting the boot top and both KNEES downhill and inside the turn. Repeat above steps.

NEXT increase the speed even higher. Add to the focus moving the HIPS inside the turn along with the knees and boot tops.

Start with a very wide stance. Boots wider than your shoulders. Don't inflict pain.
Task is to make turns and keep the skis parallel at all time.
The only way to accomplish this task is to STRONGLY steer to inside ski through the turns.
There also needs to be a forward & lateral movement to make this happen.
This so-called 'inside foot steering' is a key to making perfect parallel turns at all times.
Repeating this task you will discover little adjustments that can be made to help the steering.
Whenever you sense that your skis are not running parallel, take a non-stop very wide track run from top to bottom of a trail.
This will help make that 'inside foot steering' become a REACTION that occurs automatically.
NEXT Start with a very wide stance and as it becomes smooth, gradually decrease the boot width until they get back to a 'normal' comfortable stance. Don't reduce width until each progressive step is working well.

Skis ALWAYS want to go faster down the hill than the upper body.
If we let it happen then we lose the ability to steer (therefore control) the skis. This results in our becoming an uncontrolled rocket propelling down a steep trail. Remember the feeling!
You must keep the shin / boot contact ALL THE TIME.
One way of staying in control is to FIGHT to move our upper body down the mountain. This is a continuous task. The direction to move is both inside the turn AND straight down the FALL LINE.
Start with this as a focus on medium slope, and then gradually increase to steep slopes.
If this task is accomplished, the result will be that the TOPS of our poles will always (100% of the time) stay in our site line as we look directly down the mountain.
An effective method of keeping our bodies in sync with our skis is to continuously pull our boots BACK under our hips. This can be done quicker than trying to more our body (mass) down the hill.
As with most tasks, take a run with this as the only focus starting with a mild pitch increasing it as our comfort level increases.
Steeps and Bumps are where the problem of skis before body is magnified. On flat or groomed terrain it is easy to compensate for this situation by muscling the skis to do what you need.
You must make this ski/body relationship automatic to be able to relax and have fun on the Steeps and in the Bumps.