Better course management can realistically lower your score by 3 to 5 shots without a single change to your swing mechanics.
Tip 1 - Play to Your Natural Strengths
Choose club and target combinations that keep your most likely miss playable.
Tip 2 - Take More Club Into Every Green
More trouble tends to exist short of most greens than behind them.
Tip 3 - Avoid the Big Number at All Costs
When you are in trouble, choose the most conservative option.
Tip 4 - Commit Completely to Every Shot
Pick your target, commit fully, and execute with conviction.
Tip 5 - Use On-Course Instruction
The fastest way to improve course management is real-time feedback from a PGA instructor.