Someone already mentioned an idea that will help, don't mark with an X or a punch, write the score number in the column. Then if you get to the end and you wrote 10 in the 8 column, there is a very good chance the right score was10. If you just X'd it or punched it then you really don't know. It's harder to write the wrong number than to X the wrong column.

For the PGA comparison, two people score, you keep your score and 1 of the playing partners and they had better match when you are done!