My first car (a ’66 MGB) had two dead six-volt batteries for my entire ownership. I never shut it off or parked it unless I was on a hill, and I pop started my way through high school. Sometimes, I had to walk a bit after parking if my destination was, for example, deep into a very flat flood plain, but it in Southern New England, it never seemed to an issue, and all the pop starting and walking seemed to keep me in fine shape.
Nowadays, we expect a little more from our vehicles, and as the world has evolved, societal pop-starting skills have atrophied. So jump into the nearest vehicle with a clutch pedal, check out the video above, and go practice. You never know when The Prince of Darkness will pay you a visit!