Tom:

Deciding which engine has quit really isn't hard, the plane is going to roll into the dead one. Keep your left thumb cocked, the moment the plane starts an uncommanded maneuver pop the throttle to idle. Then you can level the wings a lot more easily. Often it's easiest also just to continue the roll back to wings level.

Even losing an engine on takeoff, chop the throttle and put the nose down. If you're quick enough you can land straight ahead, if you aren't then cutting the power will minimize the damage. Hopefully, anyway.

Bill.