The combination of wedges you use is your best chance to dial in your set for the course you're going to play. I have a pitching wedge, a gap wedge, a sand wedge and two lob wedges--a 60-degree and a 64-degree.
Why do I have two lob wedges? Because they're each great for different shots. The 60-degree has 10 degrees of bounce, which makes it good for standard shots from greenside bunkers or rough and when the ground is spongy. The bounce helps guide the club for solid contact.
The 64-degree wedge has a lot less bounce--6 degrees--which is perfect for sliding the leading edge under the ball from tight, firm lies. I used it a lot on the tight Kikuyu at Riviera to win the Northern Trust (L.A.) Open earlier this year, and it's an important club for me at Augusta.
A super-high-lofted club can be nerve-racking for the average player to hit, but it doesn't have to be. The trick is to give the grooves on the face enough time to grip the ball and send it upward and forward.
To do that, make a controlled, rhythmic swing. Don't give it a little extra burst of power through impact, like you might with a driver. If you do that, you'll cause the ball to crawl up the face, and the club will go right under and pop it up.