Which level are you at? If you want to shoot lower scores, then improving your level is the easiest and quickest way to get there.
How good is your ball striking? How does that translate into your performance on approach shots?
Did you know a Tour Professional is more accurate from 175 metres in the fairway than from 100 metres but in the rough?
The quickest way to lower a score is to improve your short game and putting but, for many golfers, the enjoyment on most holes is lost straight away.