It astounds me how many people do not know how to accurately line up square with hips, shoulders, and feet truly parallel to the target. I observe good golfers all the time on the range with their fancy aiming sticks lining up incorrectly every day.
I used to be one of those people - for a long long time. Until someone finally posed a logical question to me.
Now many golfers see the 'railroad track' method described in many golf magazines. The lines appear to be perfectly parallel. But they're not even close.
This is because whether you stand between them or on one line, parallel lines do NOT appear to be parallel in the distance.
A players toes are, let's say, 36 inches from the clubhead. If you were to lay two ropes down, each 300 yards long, side by side, wouldn't they still be 36 inches apart out at the target?
The lines above end up a good 20 yards apart. They look parallel, but they're not.
Parallel lines appear to converge in the distance when you're standing between them.
So when you lay your aiming stick down, you can basically just aim it at your target, and you'll never be more than a couple feet right. Your stick and address angles should never look left of the plane line.
So unless you are playing a big pull cut on this hole, there is a chance you will line up improperly too.