Something I love to do is I'll breathe heavily on his neck and brush my lips against his skin and just barely touch his ear with my lips, then back off. He knows now that I want him to beg for a kiss when I do this, so he'll have to convince me to kiss his neck and bite his ear :P
Then when I move back down to his lips, I'll move in for a kiss and then lean back at the very last second. Then I barely brush my lips against his, run my tongue along his lips, and kiss the very corners of his mouth but never actually kiss him. That drives him craaaaazy until he's asking me how long I'm gonna torture him :P Then when I finally do kiss him it feels amazing cuz we've both been waiting for it.