A change in your practice routine can have a major influence on the way you perform on the course.
Most golfers go to the driving range and hit a bunch of balls in a row without focusing too much on the target etc. A good way to improve your practice routine is to imagine playing every hole on your home course.
This will allow you to have a target in mind and create the feeling of playing instead of just hitting balls. Every shot will be played with a different club making the transition from range play to course play much easier.
Give this a go on the range on your next practice session and see the improvement in your on-course performance!
