Re: ShanksI've battled this a couple of times, and tried the thing with the headcover, right hand and all, but it didn't do the trick for me. What did though was following in order of importance:
1. Stance, hands should be right below shoulders at setup and space between legs and hands ample (use mirror). Do not fall into the trap of putting hands further away from the body as that will only induce sitting-down stance which will bring back the shanks along with inconsistency in impact. Also keeping hands to close to legs or your knees to flexed well explains itself, will cause you to hit it on the heel sooner rather than later. I would reccomnd a visit to a pro to just focus on the stance (it took me 3 lessons :).
2. Forward movement of upper body. In the second part of the swing (forward swing), keep from shifting upper part of body forward (to the left for right handed players). Moving the body in this way will move all your setup to the left and with it your clubead and greatly increases heel hits. My pro would hold a club at specific point to refrain me moving my body this way. Cured all my shanks with irons.
3. Wedge shanks. This was done with the help of my pro, when I suddenly got the shanks, only with my wedges all other clubs were fine. Have someone hold a soft object close to your hands at setup. In the forward part of the swing you should not hit this object. The cure for me was to focus on keeping hands at same path, or as my pro put it (shouting in the forward swing), "Pull them in for Gods sake man!"
After the above (and truckloads of practice balls) I've both cured my shanks and have created a great feel for hits/misses, and mainly it all relates to the first point, Stance. It is so important and was the main culprit in my shanks dilemma. Hope it helps but my main point would be to visit the pro you trust to help you with this, and be patient, this is not a mental issue it is purely technical.