A. I'm going to let you in on a little secret: the difference between a good hand job and the best ever has nothing to do with your hand technique. In fact, it is true that nothing you do with your hand is going to be 'better' than what your guy can do with his (in general, a steady, rhythmic pressure feels amazing, with your hand rotating down his shaft in a corkscrew motion). Instead, the key is to add sensations that he can't experience on his own.
As you're touching him, let your breasts teasingly brush against his lower abs or balls, stroke his inner thighs with your other hand. You can also treat him to dirty talk, like telling him what you love about his cock, or detailing what you want him to do to you once you're done. If you're ambidextrous, try pleasing yourself while you're stimulating him. More than likely, he's fantasised about watching that erotic display during his solo action, so having you bring it to life will be unforgettable.