Im a low handicapper and the best thing that ever helped me was the DVD AJ Bonar Reveals The Truth About Golf, he debunks the theory that a square clubface at impact is needed, infact slow mo action of tour pros shows the face open right on pre impact with rapid closing after impact, ive seen this over and over on TV too, one of the best things he teaches you is to get that club back steep, he demostrates this by placing a golf ball 15 inches behind the ball he is hitting and you must raise and lower the club whilst missing the back ball, then rotate after impact, it really does work, you watch any tour pro and they all have this steep angle of attack, he laughs in the face of the old phrase "low and slow" because as common sense and AJ points out if you actually apply and swing this way if you swing low enough on the way down to hit the ball you will fat it and if you come down late you will come up and hit the top of the ball, ive followed and copies these methods and ive never hit the ball so pure.
http://www.golf.com/golf/instruction/article/0,28136,1583055,00.html
"There's a trick, but most people don't know it." He vowed to show us how to saw the lady in half. "Everything you know about the swing is wrong," he added. "You play piano, you improve. You play tennis, you improve. But in golf, you can work and slave, and get no better. Why? Because the swing rules — square the face,' 'swing with the body — are myths. Millions of golfers have been taught wrong."
Taught wrong? I formed a carefully worded query: "What the hell are you smoking?"
As Bonar tells it, in 1968, golf instruction changed with the publication of The Search for the Perfect Swing, by Alastair Cochran and John Stobbs. Based on tests commissioned by the Golf Society of Great Britain, the book was the first comprehensive scientific study of the ballistics of the golf swing. Among their key findings, the authors concluded that golfers can't use the hands to reliably manipulate the club on the downswing. The clubface, they added, must stay fairly square through impact. "The Search gave rise to the theory of square-to-square, which became the accepted method and informed teachers like Flick, McLean, Leadbetter. Square-to-square made logical sense. Turning over the face seems reckless."
But the book was flawed, Bonar claims. It dubbed a square clubface king but ignored the fact that all good players close the face by about 120 degrees in the two feet before and after impact. That second lever, the rotating clubface, imposes tremendous energy on the ball, he says. But by swinging with your big muscles, you lose the lever. "It's like hitting a tennis ball with all arm, no wrist. You lose that extra pop." Every good golfer turns over the toe, Bonar says. When you aggressively rotate your hands, the toe passes the heel at a much higher speed than with passive hands. Bonar says unleashing this "turbo toe" is the swing's missing link. It creates a radical accelerator — the rotating face — that equals big power with little effort. To demonstrate, he stood on his left leg and socked a 3-wood 200 yards. "That was all hands and arms. No weight shift. But I killed it."
If this sounds all too theoretical, you should know that Bonar spent four years in the mid-1990s as the director of education for a California-based custom-fitting company called Zevo Golf, where he oversaw the fitting process. (He was also an R&D consultant at TaylorMade.) Bonar's eyes light up when talking about his lab days.
At Zevo, we found out some neat ****! We tested David Toms, Julie Inkster, Duffy Waldorf, Billy Ray Brown and others," he says. "We confirmed that, with top players, the toe rotates much faster than the heel through impact — up to 19 mph faster. That creates a draw bias, a face hook, worth about 30 extra yards on drives. It's like hitting a homerun in baseball — but swinging square is a check swing."
My mind reeled. Were the pillars of golf instruction built on quicksand? Had the game's top teaching pros perpetuated a Da Vinci Code-like fraud against millions. ("So dark the con of golf!") It made some sense. It explained why I never get better, how Ernie Els tags it 300 yards with a flip of the wrist, and why the average American golfer's handicap (16.2) hasn't budged in 15 years, despite golf schools, movable weights and Academy Live! Maybe we were taught wrong.
Few examples, Luke Donald doing exactly this, wide open pre impact massive roatation past impact, look how much the face turns over
http://www.youtube.com/watch?v=KeIZdcYzGbk
Jim Furyk wide open pre impact, large rotation just beyond impact, every single good pro ball striker is like this.
http://www.youtube.com/watch?v=DFDRebJy8ac
Retief Goosen look how far his clubface right before impact, now pause it just after, huge rotation
http://www.youtube.com/watch?v=OrXIT7m9LGw
Sergio clubface again open at impact, you can really see this, and quickly rotates through impact.
http://www.youtube.com/watch?v=Li9wq33aHeg
Next time you watch golf on TV and watch for steep angles of attack and close up slow mo of impact positions, watch very carefully at the club right after the ball leaves the face, it will shut left quickly. I recommend the DVD highly, might still be able to pick it up somewhere.