Cardmaps are a great source of inspiration for card makers and one I use often.
For me though, nothing compares to being a class, but for those of us who cannot always do that, this is a good alternative.
A cardmap is just a roadmap and you have creative licence to add your unique touch. I sometimes look at card that I have done using a cardmap,and it is so different, but that is what makes it unique.
A new series of cardmaps is published every quarter and the sketches are divided into different sizes - square, vertical and horizontal.
I have downloaded these for myself and thought others may find them useful as well. So on this page, I have links to the latest cardmaps (published quarterly).
Pagemaps website is http://www.pagemaps.com/cardmaps. Copyright acknowledgment to Becky Fleck and the team at Pagemaps.