Try this amazing Slice Cure!

I found this dude Bobby Eldridge who's got a system called PurePoint Golf Instruction. I wrote about him a few weeks ago and you know what, I think he's got some good, simple stuff to say about the golf swing.
Today BE's very simple way to cure your slice. Yes you have a slice, I know you do.
Now stop it already.

Try to keep your leading shoulder "down" on the ball through
impact. This is called staying strong through impact. Lots of times
the leading shoulder (left shoulder if right handed) flies up
before impact. Now just for a minute, think about what that does to
the club head when it's in the impact zone.

Golf is all about thinking and analyzing your shots to get better.
A huge part of this game is understanding "why" you're getting a
certain result, and the physics behind that result. Thinking
through your golf swing will provide huge dividends if you're
willing to invest the time it takes.

Get up from the computer and actually go though the motions slowly.
Let your leading shoulder fly up as you approach impact and you'll
actually be able feel and see the clubface coming from an
outside-in path. That causes a slice every time.

So what can you do to correct it? Well, for starters, try to learn
to keep your leading shoulder strong. Keep that shoulder "down" on
the ball all the way through impact, even after the ball is gone
and flying straight down the fairway.

So even though it may seem like the leading shoulder is higher than the
trailing shoulder, it's still facing the ball at impact. NOT TOWARDS THIRD
BASE in comparison to the ball. That would mean that you have let the
leading shoulder fly up.

For more Bobby golf guff go here.