Would you try ww pasta? What about cooking veggies in the sauce?
Can you work out for a bit? Walk around the block a few times.....
I find its much harder to get out either to do excersize or to go to the store in the winter. Especially with kids in tow and/or after it gets dark which are both usually the case by me. I really think very carefully before shlepping the kids into their bulky coats and going anywhere. I try my hardest to do any sort of errand directly after school while they are still in the car and its even hard then because I am so tired from a full days work. So any 'taking walks' is out and even getting to health stores and stocking up is out. I've been wanting to get to Trader Joe's forever but when I have a free second to grocery shop, I end up going to the regular Kosher supermarket where healthy stuff is less available and more expensive. Its a dumb excuse but it really is the case. In the summer I don't think twice about running in and out, even with the kids. Especially when we are low in food, of COURSE i'm just going to eat whatever is around.
I also find I crave fattening, carby comfort food much more when its cold out. When its warm, all I really nice is light salads and cold water. I don't crave as much.
With all that being said maybe I place the diet on hold until after Pesach