There is still plenty of time to get in some killer workouts before you tuck into the festive treats. Keep yourself in good shape as deep into December as possible and you won't find it as tough getting started again in the new year.
Also, the outside temperature at this time of year provides perfect conditions for jogging. There is lots of fresh air which feels great to breath in, and a fresh breeze is effective in cooling you down as you run. Be sure to get some reflective clothing, however, as its dark out there.
Additional. This Youtube website shows you how hard you should be working, and how tired you should feel if you want real results.
Its well worth a look. Are you workouts as tough as this?