Hi - I would add more exercise. Yard work and walking are fine for overall general health, but if you want to lose weight, you need to do some aerobic (really get your heart cranking for 20 min or more) and also start doing some weight training. I'm struggling with a "slow metabolism", and I find that if I get 1 hr 5 days a week of "gym exersise" the weight will come down, although slowly. Of course, you don't need a gym to do all this.
Good lucjk -
Diane