Land Art Calendar featuring art by Richard Shilling. I love the way it celebrates nature and impermanence.
Featuring quotes from the likes of Emerson and the Bhagavad Gita, their Meditation Calendar is a gentle reminder to find time for that silent space. And if you need a day planner type calendar, Amber Lotus has some excellent themes along the same lines. Even though everybody has tablets and computers and iPhones to keep track of things, these day planners are great for when you need to have a visual in front of you or for when you need to jot something down.
They are fabulous for keeping track of what you eat, for instance. I love to have a record of what I've eaten and what healthy things I've done (meditation, walking, etc). Their engagement calendars, like this one, have plenty of space for keeping track of all sorts of stuff and will inspire you along the way.