I used to set my hands very early. I would make a slight forward press to kick off my backswing, and then almost instantly cock my wrists as I started taking my hands back and turning my shoulders.

It worked well for me, but made for a very compact swing.

After a couple of lessons with my local pro, I now cock my wrists very LATE ... not until after the shaft is in the 9 o'clock position. Everything before that is shoulder turn and arms. That will set the club completely parallel to your feet appx a couple of inches in front of your toes at 9 o'clock, but on a very wide swing arc, giving a good tight curl of your upper body.
From there, wrists cock and arms swing to the top position.

When beginning my downswing, I try to mentally focus on using my left arm to pull my right shoulder towards the ball - imagining a fixed connection between right shoulder and right hand, so that they move in sync.

When the centre of my chest is again pointing towards the ball, I'll still have some 120deg of angle on the shaft and arms which have nowhere to go but through the ball.

Adding Greg's Right Hand drill and you will have clubhead speed like never before.

Power comes from swing arc. Speed from the hands.

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//Mox
2008 bag:
Mizuno MX-500 460cc 10.5* Fujikura Tour Platform 26.3 stiff. (about to be replaced by MP-600 10,5* UST Proforce V2 stiff)
Mizuno F-50 3w 15* Fujikura Tour Platform 26.3 stiff.
Wilson Deep Red 5w 18* Graphalloy Fatshaft stiff
Cleveland HALO 3i hybrid 22* graphite regular
Mizuno MP-60e forged 5i-PW True Temper Dynamic gold R300 steel
Mizuno MP Black OX raw haze 50/6 GW, 54/9 SW, 58/10 LW
Heavy Putter B3-M
Titleist NXT Extreme