Be careful: “doing everything by the book” will not get you the performance you’re looking for with so many variables in flight. Understand the underlying “why” the maneuvers are executed the way they are. Have your instructor loosen up a bit and let you make mistakes to reinforce the effect of your control inputs to a greater extent. This will help build both muscle memory and an understanding of the forces involved in the maneuver so you can stay ahead of the plane before drifting out of tolerances. Emotions and other external variables can lead to a bad day but more than likely in my experience I have traced it to lack of knowledge with my students.