If you read this blog much, you have heard about the oxford comma (if not, look for it in the search box on the right), the comma before the conjunction in a list. I encourage you to use it. My rule is that without that comma you can sometimes be misunderstood; but with it, you will not be misunderstood.
The rule applies even if you don’t use the conjunction at the end. Maybe I should say especially if you don’t use the conjunction at the end. This list contains only two items, but you get the point.
So use the oxford comma!