I've been doing a mess of walking in place the past couple of weeks. For some reason, this works better for me than going outside during the day. And at least it's something I can continue when the weather gets too cold or nasty for me to walk outdoors.
I select a YouTube video that's around 10 minutes long and walk in place while I watch it. I do this after every meal, and maybe once or twice more during the afternoon/evening.
And I guess it's working, because I'm down to 255.2 this morning. I really want to get below 250 by Thanksgiving, and I think it's a real possibility.