Skiing is like a box of chocolates... you never know what the next turn will be like.
Now experience often can give us a pretty good idea of snow conditions from turn to turn, but every so often what I think the snow will be and what it actually is can be two totally different things. You really don't know what that patch of trail in front of you is like till it is the patch of trail behind you, but you can set yourself up for success no matter what is about to come.
Keep your center of mass over your feet. Too often we have talked about keeping our hips over our feet resulting in upright skiers unable to adjust to varying conditions. Bend those joints. Be athletic, but keep that center over and moving with your feet.
Legs turn more than the hips. If the hips turn the same amount or, worse yet, more you begin to move into the dreaded "squaring up". Keep those legs turning to control speed, but don't let the hips turn as much. Now your facing in the direction you want to go and by moving your core towards that direction you can enter a turn in balance and able to adjust.
Maintain an active inside half. Don't pose here. Keep things moving. Like in walking where your right arm swings forward as your left leg steps, our bodies work best when upper and lower are complimenting each other through opposition. So as your outside leg lengthens your inside arm should stretch out in front of you turning your shoulders to face into the next turn. Let that hand drop to your side and your shoulders will face your ski tips and delay your entry.
Selectively direct energy from outside ski to outside ski. Maybe you want to be two footed, maybe you need to stand on that outside ski. Be selective, but direct energy from turn to turn, outside to outside. There you can balance against that ski and play with the forces of the turn. Be ready to move.
Keep these constants in mind in each type of terrain and snow conditions. If it feels to easy then your doing it right.