If you have had a lesson with me, you have heard me ask, "What were you thinking about?" The response is typically not what it should be; "I was thinking of the ball flying through the air and landing at my target." Instead, most focus on creating the perfect swing and then they overcomplicate something that is supposed to be really simple.
Another piece of advice I give my students to is be deliberate with their practice. It is not about the quantity of balls that you hit, it is about the quality. The more realistic you make your practice, the better you will become on the course. Simply hitting a bunch of balls to some target on the range is not going to help you on the course. You have to challenge yourself by picking different targets and switching out clubs. Every time you take a shot visualize a hole on a course. Would the ball land in the fairway? How many yards do you have left to get to the green? Get creative.
One of my students loves to research and he sent me the article below because it reminded him of what I keep telling him. Check it out.