Knowing your shot tendencies under pressure is critical, because sometimes it is easier to play to your tendency than fix your swing at a critical juncture
When faced with a course that has fairway surrounded by fescue first take a few practice shots to get familiar with the tall grass, then either play a wedge to the fairway or if you can go for the green play a shorter style punch finish that will allow the ball to go low and release
Knowing where your swing should bottom is important because the bottom of the swing will determine your impact location and whether you hit the sweet spot of the clubface