After reading all of the above, I was amazed to see that not a single guy mentioned the word "FUSE" or anything about "putting in the fuse" on the fuse mount assembly attached to the starter. Am I the only guy who pulls his fuse out after (1) turning off the gas and letting the car burn up the remaining gas in the carburetor bowl before (2) turning off the key once the car dies and (3) opening the driver's side of the hood and pulling the fuse out of the holder?
While everyone wants to talk about how to start a Model A, it is important to know how to safely stop a Model A (kill the engine) when you plan to park it overnight or for a couple of weeks (there's more to it than just turning off the key and reaching under the gas tank and turning off the gas shut off valve).
As a safety precaution anytime I park my Model A (while it's still running) I put it in neutral, pull back the parking brake and reach under the gas tank and turn off the gas and then let the car run at a fast idle until it dies from running out of gas. I then turn off the key. I open the hood (driver's side) and pull the fuse - if you'll wrap a 4 inch long plastic "strap tie" or "cable tie" around the fuse it's really easy to pull the fuse. I then put the fuse on top of the engine/head where it awaits my next outing. Having done all that, the next time I want to drive the A, I first open the hood, grab the fuse off the head and insert the fuse in its holder attached to the starter. Then proceed to all the steps previously stated by everyone else.
Depending upon which car I'm driving, I also open the passenger side of the hood and turn on the in-line fuel shut-off (modern aftermarket part) just below the sediment bowl. Never was crazy about parking an 83+ year old car in the garage with a carburetor full of gas that might leak out or leaving a car with the electrical components all connected - therefore I remove the fuse in case of a possible short somewhere. I'd hate to not only lose my Model A but my house as well!
One more advantage to using the "strap tie" or "cable tie" on your fuse, should the day ever come that you have an electrical short in the middle of nowhere on a tour and you start smelling that dreaded "hot electrical smell" and smoke starts coming from who-knows-where, you quickly pull to the side of the road, open the hood and you'll be glad you had the cable tie around the fuse so you can quickly pull that little puppy out in a flash! There's nothing more frustrating than having greasy hands trying to grab a tiny glass fuse in a panic situation while your wife is screaming "grab the fire extinguisher!"