Tricks?
Something that works for me, on occasion, is to have my partner perform oral on me, even though it may be so intense that I feel like I can't stand it. Then initiate something that maybe a bit more risque than you are used to, like sticking a finger up your asshole. Try something intense to keep the focus on reaching a new higher plateau.
If you find what works consistently, try to remember the feelings and emotions that accompany this. Later, when after you orgasm, practice recalling that working *trick*.
This by far does not always work for me. But when I am feeling 'Zen' enough, the next orgasm is a lot more intense than the previous and looking forward to the third + is on of the greatest ambitions. Will, that sounds selfish, also included in the ambition, to the same degree, is for my partner to get off multiple times too.
Hope this helps. I am really interested in hearing other people's magic!
Sex is total Magic and all of us have a bit of wizardry inside!