I am no longer in the obese category as of a few days ago. I started at 285, and just got down to 213 since last July. I stopped snacking, switched from regular coke to diet coke, and started playing pokemon go for 30 minutes minimum a day (been more like an hour and a half a day with the event going on in the game.) For exercise, I think more AR games should be developed that gives you a reward for walking, which could help people get outside.
It was really, really hard at first, but it became a lot easier as time passed. It's easier to just flat out move around, I save money from not buying snacks, and I just feel better overall. I have to get to 180ish to move from the overweight catagory and I am able to sustain my current lifestyle indefinitely, so it's safe to say I'll hit that target and stay there.