Don't try to squeeze it before it's ready because you'll just make it redder and possibly cause scarring - if it has a white head and seems ready to pop on it's own you can try squeezing very gently, but wash your hands with antibacterial soap first and be sure to cleanse the area; do not squeeze hard and don't break the skin.
People say not to do this but I think it's okay if you moisturise plenty; put some toothpaste on it and allow it to dry, as it'll help dry the pimple out.
Maybe get some kind of product with benzoyl peroxide in it and apply a small amount to the pimple; but if you do this it's vital that you moisturise and don't use it excessively because it's very drying.
Don't use load of different products because it's just going to aggravate your skin.
Use oil free moisturiser - I highly recommend Neutrogena products
Don't scrub your skin with flannels or face scrubs because it causes it to produce more oil and you don't want that.
Use mineral make-up as other types can clog your pores
If you can, pop it. DO NOT attempt to pop it if it is "one of those" unpoppable ones because you'll just make if worst by trying to pop it when It won't pop...
After you are able to pop it, apply some salicic acid onto it for about a minute or two then leave it be and DO NOT touch it.. There will be a scab (leave the scab be for a few days to a week depending on how big the scar is). It should be dramatically reduced or gone in a week.
Witch Hazel or Tea Tree oil will baloney it out. Don't put any make up on it like these other people have said, save the make up for the day your e going out. Clogging your pores with make up will only make it worse. Clean water and a face wash, then dab tea tree or witch hazel on it.
Wash your face... That is all really... :) Don't pop it!!! It creates other break outs...
Take antihistamines and zinc tablets. Put zinc cream on your face.
Put ice on it drink a lot of water and green tea let your face air dry when you was is and the put a moisturizer on it once it's dry make sure your hand are clean when touching your face and when you wash it try to exfoliate it