Yardage Bank
Start with yardage in the bank and spend it only when carries hit your band—misses cost distance, so every swing has a consequence like managing a scorecard.
Approach play is one of the most important parts of golf so learning to be able to control your distances is going to have a huge impact on your scoring.
Learn how to control that golf ball with confidence even if you have to feel a 75% swing with more club. Most amateurs play for their maximum output even with irons without realising that, yes they may hit an 8 iron 150 yards sometimes (2/10 times), if they swing easy with a 7 iron they may find they do it more often (7/10 times). Therefore learn to play sensibly to improve your scoring.
Learn your real yardages and feel, opposed to vanity yardages.