My resolution for this year is also the same: Get Fit and Stay Fit. (I know I try to take my resolutions ahead of time).
I remember writing a blog about this topic last year, to Get Fit and Stay Fit.
I am not sure if the list of tasks recommended in the above link might be the right ones for you, but please try to modify the list of tasks to what suits your needs, but the key is to Get Fit and Stay Fit.
Let me know how it goes.