CORRECT:

[1] At the apex of a turn, stand against your outside leg. Flex your ankles and tip your feet to move your body forward and to the inside.

[2] Aim your shoulders and your eyes down the hill rather than where your skis are pointing and your mass is moving.

[3] When your upper body is slightly countered, your skis will naturally flatten and begin to seek their new edges as you enter your next turn.

[4] Pressure the front of your new outside ski, and repeat the previous steps.

INCORRECT:

[1] Moving laterally without also moving  forward puts you in the back seat early.

[2] If you finish a turn on the tails of your skis, you stress your legs and knees. 

[3 & 4] When you’re this far back at the transition, your skis’ shovels are completely disengaged, unable to do their job of pulling you through the turn.