Do you keep a journal or log of how much activity you are currently engaging in? Without knowing more about you…if you are sedentary or active…we could be telling you to do something that could lead to overdoing it.
Otherwise, do everything possible by hand instead of using machines…wash dishes, hang laundry, dig, shovel, walk, etc. If you are sitting, stand. If you are standing, walk.
I like to park farther away and walk; saving the closer spots for someone who really needs it. I also prefer stairs to elevators; good to know where stairs are for an emergency, anyway.