Be honest with yourself!
Sarajean is right - it's important to make your New Year's goal an achievable one. Nothing leads to a failed resolution like a ridiculously optimistic goal that you secretly know you won't be able to achieve. (Only 12% of people ever achieve their New Year's resolutions!)
One way to make your goals doable is to focus on making progress, not on achieving your final goal. After all, you will never achieve your final goal unless you make progress towards it, right?