I did a search of this forum and didn't come up with anything on this so I am going to post it at the risk of it being old news. (Proper forum etiquette being observed).

I greatly admire and use the Moleskine products and found this today while perusing the web. Hope you can use it. Here are some GREAT ideas for your Moleskine.

http://wiki.43folders.com/index.php/Moleskine/Hacks

Cool topic, maybe we can add things we do? I stick a few post-its to the pocket, they are useful for writing phone numbers on. I also put an envelope in the pocket, folded in half, so I can send a letter without having to buy a packet of envelopes! Last thing, which is probably only useful if you're a girl, is to clip two hair grips/bobby pins to the spine.

A calendar is a good idea, I think I'll do that!