Yes, of course, we can all do with improving our mental game. We all need to relax more, allow ourselves to enjoy the game more and learn to focus on what we want. But we also need to practice and learn. Practicing and learning can be fun and challenging at the same time but, all too often, we see practice as a chore. Practice helps you to work on many different aspect of your game in a safe and risk-free environment. There are pros out there who have tips, ideas and drills for you to learn.
Even the strongest mental golfers need to practice. Golf psychology is an adjunct to your game and not simply an alternative to the more traditional approach.