Your practice swing is your rehearsal and thinking swing where you do any work you need for that shot, once you get up to the ball all thinking must stop and muscle memory must take over
Do not always use a lob wedge to chip around the green, sometimes using a hybrid with a putting stroke will provide more control and creativity
Try using a few of these steps to create your own personalized pre-shot routine which will help clear your mind while creating the perfect alignment, ball position and clubface needed for consistency