One thing instructors always tell players is that you need to get your shoulders parallel to the slope when playing off of an uphill or downhill lie, but when we’re playing from a flat lie, there’s no adjustment to ensure that your shoulders are parallel; in fact, typically your lead shoulder is higher than your trail one.
What should be parallel to the slope is your belt line. Trying to make your shoulders parallel to the slope can cause discomfort and uneasiness, whereas making sure your belt line is parallel automatically adjusts your weight distribution.
This will help you to make better contact from these difficult lies and you can’t guess how far a ball is going to go unless you’re making good contact.