The Avoids

The word "swing" has long been bastardized. Learning golf via technical commands to your body and leaning a language via grammar are equally devoid of confidence, rhythm and comfort.
 

AVOID GENERALLY:

The interlock and/or the overlap (Vardon) grip -gripping with the last 3 fingers of left hand (right handers).
At the address position, having the weight more on the balls of the feet.
keeping head down or still or keeping eyes on the ball.
Keeping left arm straight (right-handers).
Taking the club straight back on the first 12 inches of the backward motion. 
Deliberate breaking/cocking/turning of the wrists on backward motion. 

AVOID WITH METAL WOODS AND DRIVING:

Deliberately turning the shoulders 90 degrees and hips 45 degrees on back motion. 
Deliberately having the shaft face the target at the top of the backward motion. 
Having a "coiled" feeling at the top of the backwards motion. 
Pulling the club downwards with the left hand and arm (for right-handers) at the start of the downward motion. 
Deliberately turning/manipulating the wrists over in the forward motion - irons. 
Manipulating the club from "inside to outside". 
Deliberate "follow through" (the ball has no weight).

AVOID WITH IRONS:

Deliberately changing the ball position. 
Hitting the ball first and then the turf. 

AVOID WITH PUTTING:

Deliberately having the eyes directly over the ball. 
Keeping the club face blade square during the motion. 
Restricting wrists and arm movement in the motion. 
Keeping the club head on the ball target-line. 
Keeping wrists still/inactive.

AVOID WITH CHIPPING/PITCHING:

Choking/gripping down on the club.
Changing the stance size, or opening the stance. 
Keeping wrists stiff/inactive. 
Changing ball position. 

AVOID WITH BUNKER:

Digging the feet in the sand or "open" stance. 
Moving the club from "out to in".