If you shoot in the 90s, you don't need a new swing. You need fewer self-inflicted disasters. Five course-management rules drop your average score without changing a single mechanic.
Rule 1: Pick the smart side of the green
Every green has a "miss-here" side and a "you're dead" side. Find the bunker, the water, the shaved fall-off, then aim AWAY from it. A pin tucked behind a bunker is a trap. Aim middle-of-green; the resulting putt is fine.
Rule 2: Tee shots are about position, not distance
If you can't reliably hit driver into the fairway, hit a 3-wood or hybrid. A 230-yard ball in the fairway beats a 270-yard ball in trees every time. Track your fairways-hit % per club for two rounds; the data picks the club for you.
Rule 3: Lay up to a yardage you love
If you have 200 yards in and you can't hit a 5-iron pure, lay up to 100 yards (your wedge zone) instead of going for the green. Bogey-golf is built on the wedge-zone full shot; play to it.
Rule 4: Putt for distance, not line
Three-putts are the bogey-golfer's killer. On long putts, focus on speed only — line is secondary. A putt that ends within 3 feet is a guaranteed two-putt. A putt that ends 8 feet short is a coin flip for three-putt.
Rule 5: Take the bogey, don't compound
After a bad shot, play the next one to fairway/green centre, not "miracle save." A double-bogey from a smart bogey play is rare. A triple from a hero attempt is normal.
Book a tee time and play one round applying these. You'll shoot 4 to 6 strokes lower without changing a swing.