how to properly use a manual choke

how to properly use a manual choke and when you should use it >.< being im clueless maybe someone could answer this for me

Each car / truck / motor and temp will be different and you will need to play with it to know what your combo likes but here goes.

Try this. When cold, Pump gas (twice if really cold out) and while the pedal is down, pull the choke all the way out and then back in a bit (so it's partially open). Let go of pedal and turn the key to start (ebrake on, in neutral if standard trans, in park if auto) Motor should crank no more than 3-5 turns maximum before lighting off (assuming in good tune). Listen to the motor. If you have a good ear for music, you can hear the "note" the engine is running at. Vacuum gauge also helps. Engine vacuum usually is low for the first 10-30 seconds of running. Then it will climb a bit and you can see the temp satrt to move (unless in the freezer zones. It'll take longer) Push the choke in a bit at a time and listen to the motor. Too much choke and it will sputter and blow black smoke (carb probs can do that too, but we're assuming it's in good condition) Push it in (opening the choke ) too soon and the motor will sputter and likely stall.
   As it warms up you push the choke in and generally by 3 minutes, you can turn it off unless it's super cold or there is a vacuum leak somewhere.

My Jeep had a manual choke put on it sometime around 1991 because nobody knew how to properly adjust the original automatic choke that reportedly never worked right. Must have been all that crappy emission controled choke stuff.  heck, my car was parked for nearly a decade becuse it was almost impossible to start on cold mornings.