In the F-16 community we use the avoid curve.
in the aircraft manual there is a chart that indicates the minimum airspeed vs altitude low level, from which you can do a 3 G pull up to 30 degrees climb, bunt at 300 KTS, achieve best glide/engine start speed of 250 KTS, and have time for 1 air-start attempt before reaching min recommended ejection altitude. Below 2000 ft AGL you will need at least 420 KTS to have a chance. Hence, we never fly slower then 420 low level (usually 480) unless we are in the pattern.
Admitted, following this curve will most likely not put you in a position from which you can land in an F-16 in case the engine doesn't relight (unless there is 6000 ft of RWY directly in front of you), but what it will do in any type of fixed wing aircraft, is buy you altitude and time, which translates directly to better options regarding where to put it down.