The first thing to try would be condoms. A lot of guys last a lot longer with condoms, as it cuts the sensitivity. Another suggestion would be the creams, such as Maintain and others. They make you numb, and by desensitizing, make you last longer. This could be a problem for the female, though. Another one that works pretty well is an erection ring, which come in all sorts of materials and styles. You put the ring on after you get an erection, and it forces the blood to stay in one area. It makes the erections harder, and makes it more difficult to orgasm, thereby extending the pleasure for both partners.