Keep the club in front of the trail shoulder
The coach's key for a good takeaway is to keep the club in front - in front of the trail shoulder and the body. He cites Freddie Couples (trail shoulder stays) and Steve Stricker (trail shoulder turns back sooner, club deeper) as both keeping the club in front, and warns that letting the arms and club get behind you forces you to throw it early.
Channel: PorzakGolf
Watch official source at 6:49