Another tidbit related to the advice above is to MAINTAIN AIRSPEED when an engine quits. Some allow the model to slow by allowing the nose to come up or by trying to hold level which is OK if your position so permits.
If you zoom up and slow quickly usually resulting in being over some 30* +/- bank, then you may well turn the model into yourself or at least slide into the circle. When an engine quits, continue flying and keep up the airspeed with a shallow dive until you determine exactly where you are going for.
Enjoy!