jab, jab, cross to the face + back leg straight thrust kick, or backleg roundhouse to the head.
i dont get too fancy with with punches, the 'one,two' always worked for me. if u can execute a 1,2 fast and consistently, from my experience, its alot more effective than a whole lot of other stuff. but thats just me though.
fake a jab, go to double leg take down, side control, mount, and drop bombs. usually they try to turn over which gives me their back, then do the classic rear naked choke.
For all sad words of the tongue and pen, the saddest are these, "I might have been..."