I was asked just now for a walk through for how to make your own cards. What I will do is a step by step walk through for the two Print On Demand card services that I know of, with pictures of each step, just like I did with the book publishing earlier.
I will get this done this week as I am mostly reading up on Star Trek at the moment, the most popular system that you voted for.
The first walk through will be for DriveThruCards, which I find to be the easiest site to use.