Preparing for every shot is one of the most common differences between Tour Players and amateurs, not thinking through every aspect of your shot prior to hitting it will lead to more mistakes and the common occurrence that the second shot you hit is always better
The most important part to being consistent is to get in and out of your golf shot the same way every time
The first thing every beginner or junior should do when practicing is putt a bucket of balls to help establish solid contact and build their swing around your impact point