Just in time for New Year's resolutions, these beefed-up pedometers track more than steps. The &lt;a href='http://www.fitbit.com/zip' target='_blank'&gt;Fitbit Zip&lt;/a&gt; (left, $60) tracks steps, calories and distance, and lets you compete against friends. The &lt;a href='http://nikeplus.nike.com/plus/products/sport_watch/' target='_blank'&gt;Nike+ Sportwatch GPS&lt;/a&gt; (right, $169) records your location, pace, calories and heart rate while keeping you motivated with gentle reminders. 