I've never had a problem lasting, except for one girl in particular who was REALLY tight.
But here's some tips, I agree with Slickster too.
1. STOP pumping when you get close. Kiss, talk, or whatever.
2. Have her ride you. I find it's hard to come this way.
3. Think about something totally unrelated---like flying in an F-16 with Chewbacca and skydiving into the Swiss Alps with plasma rifles.
As long as you learn to stop for a minute when you get the first inkling of an orgasm, you'll last as long as you want.
Gotta concur with Bradd80 too that I used to care wayyy more about my performance, lol. Now, with 35ish lays and several LTRs under my belt, I dont really care. I mean I do love them well, but I'm not trying to hump them like a jackrabbit for 3 hours like I used to. Fvck that. I wanna relax.