When there is one more hole to go and you can break a milestone score, 90, or 100, or 80, think this way, and ONLY this way. No more, no less.
Think, “All I need to do is get the ball in the fairway and it’s over. I’ve done it.”
From the fairway now, think. “All I need to do is get the ball up to the green and it’s over. I’ve done it.”
From greenside or on the green, think, “All I need to do is lay the ball up close and it’s over. I’ve done it.”
From next to the hole, think, “All I need to do is sink this little putt and it’s all over. I’ve done it.”
That’s four shots, but it’s just an example. Maybe five shots will do. So play five shots, one at a time. However many, let go of the last shot, focus on the next one, never get ahead of yourself.
For each shot, but only one of them at a time, think, “All I need to do . . .” When that shot is over, begin thinking that thought again, and only that thought, for the next one. Be thinking that thought all the way up to the ball for that one shot. Just one.
Keep the task manageable. You don’t need to hit four good shots in a row (or five, or six). Just one. You only need to hit one good shot in a row.
When you have done that, start again. One good shot in a row. Not getting ahead of yourself. Just this shot. This one.
This is not logical thinking, but now is not the time to be logical. Now is the time to make it easy on yourself.