There are essentially two options you have to control premature ejaculation - physical techniques and mental techniques.
Depending on which "expert" you listen to, quick ejaculation is either all mental or all physical.
The "all mental" experts argue that it's nervousness, anxiety, and subconscious factors that cause men to not be able to control premature ejaculation.
They actually have a good point as mentally focusing your attention elsewhere will enable you to last longer, which shows that there are mental factors at play, and getting rid of those will delay ejaculation.
The "all physical" experts claim that in order to control premature ejaculation, you need to strengthen your body's "pc" muscle which is responsible for ejaculation control.
They have a good point as well.
Many guys have very weak pc muscles and cannot flex the muscle very well, leading to very quick ejaculating to occur due to loss of control.
Since both mental and physical techniques do work, it's best to learn a few methods from both.
Physical - Your PC muscle is located between your anus and testicles.
If you suddenly halt your urination, you will feel the muscle at work.
You can also halt ejaculation with this muscle.
Practice flexing it repeatedly and you will eventually gain more control over it.
Mental - You can do everything from think of your dog to think of football for mental techniques.
The key is to distract your mind from sex.
Focusing too heavily on the amazing sensations at hand, causes ejaculation to come very quickly.
Shift the focus of yoru mind elsewhere and you will last much longer.