A shank usually happens because you take the club away and on the downswing to impact the arms and hands move away from your body towards the ball target line, therefore the club-head moves further away from you as it approaches the ball so contact is now at the heel, socket of the club not middle of the face.
Two things to do. take your address position, take your right hand off the club staying in you address posture make a fist with your right hand, still in address posture make sure there is room between your left hand and your left thigh for your right fist to fit in between without touching your left hand and grip and you left thigh.
Once you've seen how where this place you left hand and handle of the club in relation to your legs, it's likely now to be a little further away from you legs than your used to but don't move it back (comfortable is what you've been doing wrong in golf rather than being correct)
Get used to feeling the new position of hands arms and club with that little bit more space there.
then place two balls about 1" apart one directly behind the other but further away from you so they look like this :
:
^ you'd where the arrow is looking at the two balls.
You address the ball furthest away from you, and starting with hip height to hip height swings. take the club away from the ball furthest away from you but strike the one nearest to you.
If you have the usual reason for shanking after you got used to this drill (it may take a few goes) it should cure you completely as long as you remember the new address position giving yourself more room between hands and legs and being able to maintain this when you're playing and practicing, whilst also remembering the reason it happens in the first place as explained above.
If this doesn't cure you, you will then be a golfer who has the case of the more unusual way to shank, thats slightly more difficult to address easily and then you'd have to answer the questions in my previous post, unless you're able to put up a vid, from DTL and face on.
Good luck
