Find the template you want to put in your moleskine, print it out, cut to size, and then use 'repositionable' glue to secure it in the moleskine. I added a 'shopping list' to one of the back pages of my moleskine. Now I can use this for a couple of weeks, and then pull it out & add another fresh one without messing with a list of old items permanently in my moleskine.
Another reason, I like this is because it is sort of like creating your own post-it notes, but having control of the content, color, and size of the note. The index card size ones at DIYPlanner.com seem to be ideal for the Moleskine.