It'll have to be the gym. I've no room at home and I've a phobia about dogs, so walking in the park is no good.
At least the first few (easy) weeks have been good, and my partner and I have been eating the right things. One bad weekend with guests slowed it down a lot.
I'll try a local gym for a month and see how I do. I'd like to do cardio a bit to get a little fitter, then I need to lift weights as well. I'm pretty hopeless at lifting heavy things, but it burns calories, and I quite enjoy it. It's all the showering and undressing afterwards that gets me.
save the planet - it's the only one with chocolate