Vibrators aren't just for women. Try this tip. Get a hand-held massager with interchangeable tips ($15 to $20 in most stores). While lying on your back, use your favorite stroking technique to get super hard. Now, using the cup-shaped attachment, place the cup over the head of your penis and turn it on low setting, and hold your erection with the other hand so that it points straight up. Without even stroking, you will experience a mind-blowing, cum-drenching orgasm within minutes, if not seconds. Don't be surprised by your spontaneous moans and screams, that's how intense your orgasm will be. The feeling you experience is most likely identical to the feeling that a woman gets when a vibrator is placed directly on her erect clitoris. To enhance the sensations, try placing the vibrating cup directly on the tip, or place it on the top half of your cock head, near the cock head ridge. Also, when you feel you are ready, try the high setting too. Or switch back and forth between high and low.
The great thing about this technique is that you will cum with less stroking, thus lowering wear and tear on your shaft.
Word of warning: Don't do this technique too frequently, or you may start to lose sensitivity and sensation. Once a week or less would probably work well.