As Bubba says, grind it up for lean hamburger. Really! Round is not worth using as a "steak." If you want a steak, get a better cut of beef. Where I am, they put USDA Choice New York steaks on sale for under $4/lb, roughly every two months.
For what to do with a "Round Steak" -- cut it up across the grain, marinate it for a few hours, cook it slow.