Avoiding starting the hosel instead of the Sweet Spot

[streak]

In recovering from a shoulder problem I developed some bad compensations, the following gave me some insight -

2-F notes: “If Lag Pressure is lost the Hands tend to start the hosel (instead of the Sweet Spot) toward Impact – that mysterious “Shank”. When in doubt, “Turn” the Clubface so both the Clubshaft and the Sweet Spot will be on the same Plane at the Start Down.”

I think I understand the first sentence. How best does a Swinger maintain Lag Pressure especially at the Top and End (to avoid starting the hosel instead of the Sweet Spot)? Especially how does it feel at PP 3 through the Top and End and Start Down transitions?

About the second sentence, when should the Clubface be Turned and how is this done? Thanks.