If you're on your island, have James send Ursula Undress over in her bikini to take your mind off these things.
Most of the bigger tractors have real chokes. Pull it all the way out. Turn ignition switch to "start". When it fires up, push choke in about half way until it warms up and maybe starts to "hunt". Then push choke all the way in.
On almost any engine, you can usually push the choke in about half way after it fires. This is always the routine on my chain saw engine. Pull with full choke. Fires once. Push choke back to half. Pull cord. It starts.
If you have a smaller, dinkier engine, it likely has one of those bulbs to ensure fuel is to the carburetor. Follow instructions for number of pushes. On most, it doesn't hurt to push more than it says because all it is doing is pushing fuel through the supply line and through a bypass back to the tank. Some still require choking either on the throttle control or via a separate choke. Some don't, as the push button gives it a fuel shot. On this type, don't push more than it says. If the throttle control doesn't have a "start" position, the bulb is one of those squirter types.
If you have a fuel mix engine without one of those push buttons, you MUST use all the fuel up in the tank each time you use the implement. Otherwise, you'll be very sorry you didn't the next time you go to use it. Fortunately, these types are very old machines and likely retired (except for my 35 year old Stihl).
Ralph