Paul, I agree that it is easier to buy when you remember that you need something and have the chance to make the purchase. You may get a response to "make a written list" from one of the younger (still has good recall of recent events) fellows. Good idea except when you get older one discovers that you either forget that you have a "list" or forget to put something on the "list" or, more often, forget where you put the list until after you send in the computer order. That is when you discover that the "list" is under your keyboard or some other silly place that you put it so you "don't forget!"
Paul, By the way I did remember to look in the local Auto Zone and saw that next to the "Brake Clean" spray they had the "Electrical Clean" (OK to spray onto alternators and other electrical stuff) to clean up oil and grease. This stuff may work on the alternator you have that got oil on it.