Well, I must say that this is an interesting question.
Landing an airplane is a simple concept for which a complicated process is required. If you have functional pilot training you will be aware of key factors such as airspeed, altitude, rate of descent, etc. You would also have some recognition for the basic instruments, the six-pack of flight instruments: airspeed indicator, attitude indicator, altimeter, vertical speed indicator, heading indicator and turn coordinator. Whether you are on-board a Cessna 172 or a Boeing 747, these are held in common and are all that you need to fly the plane in its most rudimentary form.
There have been instances when total novices have landed small planes when a pilot was incapacitated. What they all shared in common was that they remained calm and established radio contact with the ground immediately. The necessary instructions were transmitted to them via radio.
There is no official guide for this, but I did find a wikihow article which does a fairly decent job on what to do in such an instance.
I hope neither you, nor any of the other readers ever have to face such a scenario.