Practice and relaxation should help you deal with the problem. Some men try to distract themselves by thinking non-sexual thoughts (such as naming baseball players and records) to avoid getting excited too fast.
There are several helpful techniques you can try.
The "stop and start" method:
This technique involves sexually stimulating the man until he feels like he is about to reach orgasm. Stop the stimulation for about 30 seconds and then start it again. Repeat this pattern until the man wants to ejaculate. The last time continue stimulation until the man reaches orgasm.
The "squeeze" method:
This technique involves sexually stimulating the man until he recognizes that he is about to ejaculate. At that point, the man or his partner gently squeezes the end of the penis (where the glans meets the shaft) for several seconds. Stop sexual stimulation for about 30 seconds, and then start it again. The person or couple may repeat this pattern until the man wants to ejaculate. The last time continue stimulation until the man reaches orgasm.
Antidepressants such as Prozac and other selective serotonin reuptake inhibitors (SSRIs) may be helpful because one of their side effects is to prolong the time it takes to reach ejaculation.
You can apply a local anesthetic cream to the penis to reduce stimulation. Decreased feeling in the penis may delay ejaculation. Condom use may also have this effect for some men.
Evaluation by a sex therapist, psychologist, or psychiatrist may help some couples.