Step 1: take an object from your surroundings.
Step 2: describe it as you normally would.
Step 3: look at your description with a critical eye and remove all that is not strictly necessary to give a unique characterization of your object.
Bonus step: Repeat step 3 until you have a set of mathematical variables; preferably as uniform as possible.
Everybody can join in on this exercize; take the steps to the stage you feel you are able. Write out your previous steps if you would like to. Any input will be greatly appreciated.