Eat less and exercise more.
Smaller portions on your plate, don't go back for seconds.
I generally get up at first light, walk the dogs about a 1/2 mile so they won't do their thing in the yard, eat breakfast, check the mail and the walk the dogs for a mile or so. When I lost weight, I increased the second walk to double the distance but I tried to make it last, time wise, no longer than the first walk had been.
And get a good nights' sleep.
And as I eat about 0600ish in the morning, I would have a snack at around 0930ish. It would be a piece of cheese, or some dried fruit or some nuts. Washed down with lots of water, tea or coffee.