Sir Nick Faldo suggests it wise to do some on-course practicing. Clearly you would not be doing this during your Sunday morning 4some but if you're out late in the day and have the course mostly to yourself, maybe give this a try. But remember, you can't post scores from your practice rounds!
Practice (carefully) on the course.
Beating balls on the range has its limitations. It's hard to tell exactly how far the ball is flying, and it doesn't behave the same landing downrange as it does landing on a green. In my prime, I loved to go out at Wentworth and Lake Nona early in the morning before anyone got there and hit four balls into every green. I'd do this from the edge of the fairway or even from the light rough, so I didn't chew up the fairways, and I fixed my ball marks. I'd try for a slightly different ball flight with each shot. This "real" type of practice will sharpen your focus and benefit you in ways beating balls on the range cannot.