It is already three or four years since I last mentioned "lose weight" among my new year's resolutions.
There are several reasons for that, and none of them has something to do with whether or not I think I should lose weight in general.
I think the january resolution to lose weight puts too much pressure on me and ends up being counter-productive. Starting working again after the holiday season is hard enough, winter is cold and dark, and I don't really need another reason to get depressed.
In the case I have gained something suring the holidays, what I do is
- start again my regular routine (which involves first of all work, where I really walk a lot, including up and down the stairs, then long walks during weekends, and some ballet classes);
- buy more green stuff at the market, and prepare/cook it during the weekend, so that during the week I have ready vegetables and/or a soup, and lots of fruit to snack on;
- avoid buying more sweets, and limit myself to dark chocolate.
I find this strategy very efficient: it's like easying on eating normally again, so that my body and brain get kind of "tricked" into this routine.
I find the body tends to revert to its normal weight once life goes on regularly, so there is really no need to sweat on a couple of Kg gained (I'd say: enjoy your meals during holidays, and the company you share them with!)