DH and I walk. In fact we need to get out today with Pi. She's in that rebellious stage right now and is a lot easier to deal with if she is tired so we will hopefully get her out for a half hour walk in the woods this afternoon.
Unfortunately, I have to follow a rather strict diet for health problems but what I found to help me so much was measuring serving size and sticking with it. Also watching my carb intake. If you ever want to see why there is an obesity problem in America, go to a steak restaurant and watch what people eat, or rather what they serve people. I swear I have taken home enough food for another meal for myself when I used to eat out a lot with friends. Unfortunately the bulk of the people around me sit and clean their plates. It's so much easier gaining weight than it is losing it....unfortunately.