The most common fault in pitching is taking the club too far back and decelerating on the downswing, practicing how to finish your pitch will solve this problem
Bunkers are easy shots you just need to compensate for the fact that you are hitting sand not grass, plus John shows you how to eliminate the dreaded bunker skull shot
Don't make things more complicated than they need to be; use the same swing in and out of the bunker and take advantage of the bounce in your sand wedge