There are no memory items, since there is plenty of time (2 mins) to consult the QRH.
However, that being said the first action is to manually move the start switch to off. It is in my opinion good airmanship to have enough system knowledge that if any automatic system fails (in this case the solenoid holding the start switch didn't release it automatically for some reason) you are able to operate it manually.
In this case it will save you the bother of getting the QRH out 99% of the time, since it's quite common that the solenoid fails to release the start switch. If the light goes out when you move the start switch to off, you no longer need to do the checklist.
Kind of like a Center tank Fuel Pump Low pressure light. You don't get the QRH out if you know you just ran the tank dry.