Most Helpful Guy
lay ontop of each other while you make out, also let him feel you (with clothes ON) and vice versa (with clothes ON)
Most Helpful Girl
Spicing up a makeout sesh will probably just lead to a wider desire for sex on his part and possibly yours.
Make sure both of y'all are on the same page before attempting anything suggested cause I know what its like to lose one's inhibitions in a heated moment of lust.