If you lose your balance during the swing then you probably made a bad swing, make sure your body is balanced on your front side at the end of each swing
Play your bunker shots with the same stance as your pitch shots; set up square to the target line and square the clubface to make this an easier shot
This drill is great for people stuck in an office or in bad weather, hook the right hand under the left and practice your backswing and downswing with a perfect right and left wrist position