New Year's Resolution: Train to Hike the Canyon

My New Year's Resolution for 2012: Train to go from being the most unathletic girl in my 1970s elementary-school class to a 40-something woman ready to day hike the Grand Canyon! What are your New Year's Resolutions? Do you have any new activities you'd love to try: zipline through the Redwoods, ice skating after years away from blades, T'ai Chi? Please inspire us all...