I have resolved to run a thousand miles this year.
In 2006 I felt my running had gone backwards and my times were getting progressively slower. When I sat down to work it out I found I'd clocked about 550 miles on the Garmin, a lot less than I'd thought.
Took advantage of the Christmas break to build my mileage back up and am doing ok so far, but am aware I need to aim for at least 100 miles a month to get ahead of my target and allow for downtime through holidays, injuries, colds etc.
My non-running resolution was to expand my musical horizons by not buying any more compilations or CDs of albums I already own on vinyl and trying some more current acts.