Here are a few techniques that work for me.
1. Don't move. I'm big so I'm almost always underneath at first letting someone slide on me in their own good comfortable time. They move, I don't. The less I move the longer I last. If I'm on top I don't pump my hips. Specifically I don't squeeze my butt muscles when I thrust. I thrust by moving my whole body. I go slow.
2. Masturbation before meeting a date. If I get the first quick come out of the way I always last longer second, third and fourth time if we go that long. Some partners like to be part of the first quick orgasm, eg by oral, as part of foreplay before we start coupling later on. That's fine, too.
3. When I get close I stop moving for a while till I calm down. This delays orgasm. Relaxing and breathing deeply helps. If my partner wants to keep moving that's fine unless it's going to make me come. Then I'll communicate that I'm going to come if they keep moving. This works well because we can take turns moving.
4. I'm not a one-and-done guy. If I do come quickly I know I'll get hard again after a rest--a refractory period--of ten or fifteen minutes. Until then kissing, caressing, massaging and going down on a partner continues to pleasure them until I'm ready to go again.
I'm not in it primarily for my orgasm but theirs.
Communication is important. Both ways.
Hope this helps.