Adequate walking, sleeping, meat and dairy is probably all you really need to be healthy. I have bought a couple pedometers to track my steps, but keep losing them, so I've had to resort to counting my steps again. Of course, I don't count every step like a madman, but only every other step. At the end of my walk I multiply that number by 2 to get the total number of steps.

@hwisdom they probably still contain calcium bicarbonate