How Can I Orgasm Quicker While Having Sex?

This rather depends on whether you are man or woman, so I will answer the question from both perspectives.

Orgasm is a complex psychophysicological process that isn't simply a pleasure switch.

There are two positions that women find particularly stimulating.  The first is on top and the second is with your partner behind you, on your hands and knees.  The first provides friction on your sensitive areas and the second provides deep inner stimulation.  It is possible for you to rub your sensitive area whilst having intercourse with your partner and this will usually help.  However, if the problem isn't physical, perhaps you need to alter the mood, situation or even partner.

Men don't usually have too much of a problem with this area.  However, lots of foreplay without opportunity for climax, manipulation of the testicles or rubbing of the prostate area can often bring about a quicker orgasm during intercourse.