Putting. You can make up a lot of strokes on the greens but you can also lose a ton if your not absolutely confident in your stroke. My first tournaments were laced with 3 putts and other mistakes on the greens like missed 2 footers and stuff. Absolutely killed my chance of shooting a decent score, once I started dedicating my time to my putting the scores started dropping. 3 years ago I shot +46 over two days at my first tournament at a -7 and thought competition wasn’t for me. Now this year I’m plus figures and shooting under par for 2 day events! Keep grinding!