I don't use this technique very often but it is one of the best and slightly slower more enjoyable techniques.
First you get your favorite lubricant and smear your penis head, so if you're like me, uncircumcised, just pull the foreskin back. Then you wrap your hands around your shaft like you would normally masturbate but so that the thumb is not the top of the penis between the penis and your abdomen, but slightly on the underside. Then you use your thumb to rub your frenulum (the little Y shaped piece of skin between the parting of your penis head glands on the underside of your penis, under the peehole). I also occasionally rub the underside of the glands on the opposite side of the head. This will bring a very tingling sensation and quite a powerful orgasm. It's hard to keep at it but if you do it's great.