Wrist Angle for straight shots

I played great yesterday, Only had one shot yesterday that I didn't like. It was a hook I hit with a 7 iron. I went to the range after playing...and could hit nothing but hooks...pitching wedge through driver....I was getting very frustrated. Halfway through the bucket I started checking down everything... my setup was good, my alignment was good, my shoulders and hips were square... so I started my swing went all the way to the top, paused, and looked at my wrists... they were collapsing , the arm was falling into the wrist and the knuckles were protruding towards my head... so I corrected there (maintaining a nice flat line along the outside of the arm, through the wrist all the way to the knuckles, wrist hinged 90* to my arm) almost like a preset hinge, bounced my arms a few times then finished the swing... I had to do this several times before that wrist feeling became or is becoming another part of my swing routine. I would absolutely hate to have to be thinking about something like this while playing...but it was good knowledge to have incase I hit that shot while playing...with a few swing rehearsals... I could hopefully fix a problem like this in the middle of a round if it creaps up on me again.