If you can feel you're about to ''go'', then stop. It helps if you pinch the shaft of your penis too (not too hard obviously). Just breathe deep and continue until when you think you're ready. Don't go too fast either.
During actual sex im sure your partner would rather you take a breather for a second or two, then to only last for five minutes.
I have masterbated for many years and i masterbate a few times a day even with others, I found the best and more satisfying pull I have had was when I would lie on my side with my left leg straight and my right leg at 45 Deg: with my joy stick just resting on it. Then I would just go slow with just a few fingers and enjoy every stroke and squeeze it every now and then with all your hand and occasionally speed up buy not for to long. It takes a while and then you come with a real gush your right leg joins the left leg and you stick your joy stick out and really pull hard and I was really stuffed after that with cum all over my bed and it was really great, so I just do that when I can as I find it really is a bit of a marathon but it is really damn worth it.
I have a diferent way of masterbation. What you do, is let my sexual frusterations build up. I do this by A) Watching porn B) Watching sexual activities C) Watch something that stimulates me (eg. Pantyhose foot play, I recomend the nylon foot chanel)D) Haveing sexual Fantices. I found I had no stimulateing feeling unless there was a build up. You can chaeck your build-up by doing regular penis cheks. If your penis is incresing in size, or length, then your sexual frustration is increseing. The otherway to check, is if you have frequent longing feelins in the gental area. this feeling should be welcomed,especialy if longing contenues, and you cannot urinate. After you feel you cannot contain the longing, that is the time to masterbate. For men, wrap your pinis in something that stimulates you. Most men are stimulated by pantyhose, so lets go with that. Say you wrap your penis in a pantyhose sock, then, preform various masterbation techneques, such as strokeing, massageing, putting suliva on your fingers, and rubbing the top of the penis ext. I find these methods work best while your genital area is submerged in water, like a shower. Your penis should mistake that water for suliva. Contenuosly reb your penis until your musles tighten. Wicheverway excites you the most, contenue that motion. For first timers, it should feel relaxing, comforting, strange, horifying, and you might want to stop. Welcome the feeling, for that means that your penis is now ready for the final stage of masterbation, ejaculation. Your breathing should increse, and (at least for me) you might feel a pang in the back. Contenue the sexual motion, until you feel relief. If thepang stops, check your penis. You can identify if the ejaculation was successful if you see a clear, shiny substace. This is semen. Then, repeat the procees,.