What to do when your key doesn’t work very well

So, the years have passed and your key works but only if you jiggle it or if you pull it out a little bit?  Chances are that your key and/or the pins in the lock have worn down.  You can remedy this situation very easily and inexpensively by having your key copied but shimming the original key with a folded piece of paper to raise up the heights and counteract the forces of abrasion over the years.  This will compensate for lost material on your key as well as the pins in the lock.  This should only cost you $3 or less, if you have a common key blank.